On the Grassmann image of a four-dimensional submanifold inE 6
Keyword(s):
1991 ◽
Vol 46
(2)
◽
pp. 45-94
◽
Keyword(s):
1983 ◽
Vol 45
(2)
◽
pp. 155-168
◽
Keyword(s):
Keyword(s):