L.  Mazanek, Laska, P., Bicik, V., Dusek, J., and Novonty, R., ?Descriptions of puparia of Afrotropic species of Betasyrphus Matsumura (Diptera, Syrphidae)?, Acta universitatis Palackianae Olomucensis Facultas Rerum Naturalium Biologica, vol. 37, pp. 89-98, 1999.

L.  Mazanek, Laska, P., Bicik, V., and Nielsen, T. Randlff, ?Key to males of Norwegian species of Eupeodes (Diptera: Syrphidae)?, Dipterologica Bohemoslovaca, vol. 9, pp. 143-52, 1999.

L.  Mazanek, Laska, P., and Bicik, V., ?Revision of type material of Metasyrphus chillcotti (Diptera:Syrphidae)?, Dipterologica Bohemoslovaca, vol. 9, pp. 139-142, 1999.

L.  Mazanek, Laska, P., and Bicik, V., ?Two new Palaearctic species of Eupeodes similar to E. bucculatus (Diptera, Syrphidae)?, Volucella, vol. 4, pp. 1-9, 1999.