C, PHP, VB, .NET

1. Петров, Ф.; Исуфов, Р. – „Интернет базирана среда за разработка на диалогово-обучаващи програми по математика“ в сборник „Математика и математическо образование СМБ 2009г.“, София, Издателство на БАН, 2009г., стр. 312-319, ISSN 1313-3330.

Доклад на XXXVIII пролетна конференция на СМБ, Боровец, 1-5 април 2009г.

2. Petrov, Ph.; Popov, A.; Isufov, R. – „Standardization of the development of educational dialogue computer programs“ in the book „Proceedings of the 6th Mediterranean Conference on Mathematics Education“, Plovdiv, Inch-Venci-2, 2009, pages from 99 to 111, ISBN 978-9963-9277-9-1.

Reported on the 6th Mediterranean Conference on Mathematics Education, Plovdiv, 22-26 April 2009.

3. Isufov, R.; Petrov, Ph.– „First steps in constructing a theory of educational dialogue computer programs“.

Reported on MASSEE International Congress on Mathematics MICOM 2009, Ohrid, Republic of Macedonia, 16 – 20 September, 2009.

4. Velchev, A.; Petrov, Ph. – „A trial for systematization of methods for generating and solving variations of discrete optimization problems and the three jugs problem as an example“.

Reported on MASSEE International Congress on Mathematics MICOM 2009, Ohrid, Republic of Macedonia, 16 – 20 September, 2009.

5. Gotseva D.; Gantcheva V.; Petrov, Ph. – „Secure and practical defense against code injection attacks“, Challenges in Higher Education & Research, vol. 7, eds. L. Dimitrov, T. Tashev, R. Deliyski, Heron Press, Sofia, 2009.