Leonard Mihaly-Cozmuta, Teodor Visan, Anca Mihaly-Cozmuta, Camelia Varga, Vasile Viman and Gheorghe Vatca
American Journal of Environmental Sciences 1 ( 2 ): 159 - 163 , 2005
Mariana DOBRA, Vasile VIMAN and Gheorghe VATCA
American Journal of Environmental Sciences 2 ( 3 ): 92 - 94 , 2006