BEITRAGE ZUR ALGEBRA UND GEOMETRIE
journal53107
E020161
DE
0138-4821
German
Rivista
Heldermann Verlag:Langer Graben 17, D-32657 Lemgo Germany:011 49 5261 10226, EMAIL: heldermann@gmx.net, INTERNET: http://www.heldermann.de, Fax: 011 49 5261 15264
1971
can
restricted
cannot
false