"RIV/61388955:_____/09:00327327!RIV10-AV0-61388955" . . . . "Catalysis Letters" . . "J_imp \u010Dl\u00E1nek v impaktovan\u00E9m \u010Dasopise" . "33.57"^^ . . "http://www.isvav.cz/h12/resultDetail.do?rowId=RIV%2F61388955%3A_____%2F09%3A00327327!RIV10-AV0-61388955"^^ . . "25.833"^^ . "33.57"^^ . "jnih.EZPi6HT!gjUQ2SZmUgKx0I=" . "25.833"^^ . "1"^^ . . . "Coumarins Preparation by Pechmann Reaction Under Ultrasound Irradiation. Synthesis of Hymecromone as Insecticide Intermediate" . . . .