Vestnik of
Samara State University
2003, No. 4
2005, No. 2
2005, No. 5
2006, No. 2
2007, No. 2
2008, No. 3
2003, No. 42003, No. 42005, No. 22005, No. 5 2006, No. 2 2007, No. 2 2008, No. 3