Vestnik St. Petersburg University, Mathematics
Vestnik St. Petersburg University: Mathematics > 2007 > 40 > 2 > 131-137
Vestnik St. Petersburg University: Mathematics > 2007 > 40 > 2 > 93-98
Vestnik St. Petersburg University: Mathematics > 2007 > 40 > 2 > 152-157
Vestnik St. Petersburg University: Mathematics > 2007 > 40 > 2 > 158-168
Vestnik St. Petersburg University: Mathematics > 2007 > 40 > 2 > 107-113
Vestnik St. Petersburg University: Mathematics > 2007 > 40 > 2 > 123-130
Vestnik St. Petersburg University: Mathematics > 2007 > 40 > 2 > 99-103
Vestnik St. Petersburg University: Mathematics > 2007 > 40 > 2 > 118-122
Vestnik St. Petersburg University: Mathematics > 2007 > 40 > 2 > 114-117
Vestnik St. Petersburg University: Mathematics > 2007 > 40 > 2 > 138-151
Vestnik St. Petersburg University: Mathematics > 2007 > 40 > 2 > 104-106