|
Affiliation |
| Institute of Mathematics and Informatics Bulgarian Academy of Sciences |
| Department of Applied Mathematics and Informatics Technical University - Sofia |
Address |
| Acad. Bonchev str. 8 1113 Sofia |
| IMI-BAS: +359-2-9793815, DAMI-TU: +359-2-9652496, Mobile: +359 896309735, Fax: +359 2 971 3649, Email: rkovach@math.bas.bg |