An improved lower bound on the covering number K2(9, 1). - Emil Kolev; Ray Hill (Discret. Math., 1999)

Optimal Binary One-Error-Correcting Codes of Length 10 Have 72 Codewords. - Patric R. J. Östergård; Tsonka Stefanova Baicheva; Emil Kolev (IEEE Trans. Inf. Theory, 1999)

Search for a moving target in a graph. - Nikolay Beluhov; Emil Kolev (Electron. Notes Discret. Math., 2017)