Hansen V.L
Braids and coverings selected topics - NY Cambridge university press 1989 - 191 - London mathematical society student texts 18 .
ГФ-19554
Англи хэл дээр,
0-521-38479-6
topology geometry algebra & trigonometry
Braids and coverings selected topics - NY Cambridge university press 1989 - 191 - London mathematical society student texts 18 .
ГФ-19554
Англи хэл дээр,
0-521-38479-6
topology geometry algebra & trigonometry