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• General Information
• Important Dates
• Keynote Speakers
• Committees
• Paper Submission
• Registration Procedure
• Venue
• Scientific Program
• Journal Publications
• Social Program
• Useful Links
• Contact us


Registration Procedure

The Registration will be done online through credit card. Please read the instructions below.

Please click here to register and pay the fee.

On the page that will open, choose first "Registration Type" and select your registration, e.g., "Early Registration". Press "Add to card". If you have to pay for something else, for example postage for visa letter, please press on "Continue Shopping" and then "Home". Then, you can choose other categories, for example "Postage of Visa Letter". When you finish the selection of categories, press "Check out". Note that the name of the visa holder should be written exactly as it appears on the credit card. On the next page, the name of the participant should be written (if different), the abridged name(s) of the paper(s) and their ID numbers.

After performing the payment and receiving an automatic receipt, please send an e-mail to with your name, affiliation, e-mail, and paper(s) for which you paid. If you paid for postage of visa letters or additional banquet tickets, please indicate this as well. Important: Do not send any credit card information by e-mail.

Registration fees

Early registration by March 20, 2017
(mandatory for authors of full papers)
US$ 540
Regular registration after March 20, 2017
and on site registration
US$ 640
Full paper reduced registration*
(for an author, presenting multiple papers - 2nd paper, 3rd paper, etc.)
by March 20, 2017
US$ 260 for each additional paper
Reduced registration for students**
by March 20, 2017
US$ 490
Additional copy of the book US$ 40
Accompanying person banquet ticket US$ 50
Accompanying person conference trip US$ 50
Accompanying person welcome reception US$ 20

The full registration fee includes:
  • Attendance of the conference sessions
  • Copy of the proceedings containing the paper(s) presented by the author
  • Materials
  • Banquet
  • Social program
  • Refreshments during the workshop breaks
*Full paper reduced registration (for an author, presenting multiple papers - 2nd paper, 3rd paper, etc.) is for individuals that already paid the full registration fee for one paper and as authors of multiple papers are going to present a second, third, etc. paper. It does not include any additional materials, social program, banquet ticket, etc. and cannot be used by a co-author or a guest to attend the conference sessions or the social events.

**Student registration is for full-time undergraduate, master, or doctoral students, who are the first author of the paper and will attend the conference and present it. After registering, please send an official letter from your advisor on headed paper that you are a full time student.

For papers with multiple authors, each author must register separately and pay the applicable registration fee (early registration fee before March 20, 2017 and full registration fee after that date), if he/she plans to attend the conference.

Only one individual can participate with one registration fee.

Early registration fees and student registration fees are not refundable. Regular registration fees are refundable with $300 cancellation fee.

The reduced registration fee for short communications presenters (BGN 100 before May 1, 2017) includes:

  • Attendance of the conference sessions
  • Copy of the booklet containing the short communications
  • Refreshments during the workshop breaks
Instructions for payment of this fee will be posted in April.

If you need a Bulgarian visa, click here to download a sample letter for visa purposes in MS Word format. Note that this letter (called further a "visa letter") is only an official notification of acceptance of your paper. We do not know what the visa issuance process is, neither we can guarantee that you will be issued a visa.

Please use the sample letter to fill up your name, affiliation, address and the title of your paper. Capitalize your last name (family name, surname). Send it in attachment to Write "Visa letter request" in the subject. State the e-mail/postal address/fax number to which the letter should be sent and specify your preferred way of receiving it. (Note the options and the fees below.) We will verify the information, print it on headed paper, and send it to you according to the mailing method you have chosen.

Visa letters will only be issued to:
  • Speakers/Presenters,
  • Committee Members, and
  • Attendees
Visa letters will state only the following facts:
  • Workshop title, dates and location
  • That the requester has paid the required registration fee in full
  • If they are either a committee member, speaker, or presenter
The letters will be sent as an e-mail attachment to you. If you need the letters faxed, sent by regular, express or courier mail, please add up the respective fees of US $15, US $10, US $40 or US $100 to your registration. Write the address to which the mail has to be sent or the fax number. Please note that no more than three attempts will be made to fax a letter.