ZLATANOV Boyan
-Associate Professor, Ph.D., at the Plovdiv University "Paisii Hilendarski", Faculty of Mathematics and Informatics, Department “Mathematical Analysis"
-E-mail: bzlatanov [@] gmail [.] com
-Web: http://fmi.uni-plovdiv.bg/index.jsp?id=1035&ln=1
XI.I-11 Some Properties of Reflection of Quadrangle about Point