Blerina Boci; Department of Mathematic, "Aleksander Moisiu" University of Durres; Valentina SHEHU; Department of Mathematic, Tirana University(International Symposium on Computing in Informatics and Mathematics, 2013-07-15)
Dorina GUXHOLLI; Department of Mathematic, "Aleksander Moisiu" University of Durres; Valentina SHEHU; Department of Mathematic, Tirana University(International Symposium on Computing in Informatics and Mathematics, 2013-07-15)