Embryotoxic effects of venoms of selected snake species of the Elapidae family = Embryotoxic effects of venoms of selected snake species of the Elapidae family / Magdaléna Polláková, Zuzana Andrejčáková, Vladimír Petrilla, Silvia Ondrašovičová, Radoslava Vlčková, Monika Petrillová, Drahomíra Sopková KE304