Tselkov, Veselin, and Nikolai Stoianov. A Model of Software Cryptography System for Data Protection in Distribution Information Systems., 2018.

Tselkov, Veselin, and Nikolai Stoianov. A Formal Model of Cryptographic Systems for Protection of Information in Computer Systems and Networks In Bulgarian Cryptography Days ? BulCrypt 2012. Sofia, Bulgaria, 2012.

Tselkov, Veselin. "Cryptographic Software Solution for Information Protection in a Corporate Intranet." Information & Security: An International Journal 4 (2000): 97-104.

Tselkov, Veselin, and Dragomir Pargov. "Information Assurance in C4I Systems." Information & Security: An International Journal 4 (2000): 43-59.

Tselkov, Veselin. The challenges of 21th century for security of the information society In 1999 AFCEA-Sofia Seminar. Sofia: Sofia: AFCEA-Sofia, 1999.

Tselkov, Veselin, and Dragomir Pargov. Security of Information System on Internet In Sofia: AFCEA-Sofia, 4 - 5 December 1997., 1997.

Tselkov, Veselin, Dragomir Pargov, and Rusin Petrov. Criteria of Computer System Security Assessment and Evaluation In nformation Aspects of Security and Development of Modern Societies, Edited by Velizar Shalamanov and Todor Tagarev. Sofia: AFCEA-Sofia, 1996.

Pargov, Dragomir, Veselin Tselkov, Rusin Petrov, and Iliya Kraytchev. Security in Computer Systems In  AFSEA-Sofia Information Aspects of Security and Development of Modern Societies, Edited by Velizar Shalamanov and Todor Tagarev. Sofia:, 1996.

Pargov, Dragomir, Veselin Tselkov, Rusin Petrov, and Iliya Kraytchev. Security in Computer Systems In Information Aspects of Security and Development of Modern Societies, Edited by Velizar Shalamanov and Todor Tagarev. Sofia, Bulgaria: AFSEA-Sofia, 1996.

Tselkov, Veselin. A software security tools for information protection in PCs ? ?CS_SECURE_TOOLS  In First National Conferences ?INFORMATIC?94. Sofia, Bulgaria: SAI, 1994.