m -parallelisms. Johnson, Norman L., Pomareda, Rolando (2002) International Journal of Mathematics and Mathematical Sciences
Quasifibrations. Jha, V., Johnson, N.L. (1996) Bulletin of the Belgian Mathematical Society - Simon Stevin
The classification of spreads in P G ( 3 , q ) admitting linear groups of order q ( q + 1 ) . II: Even order. Jha, V., Johnson, N. L. (2003) Advances in Geometry
The maximum size of a partial spread in H ( 4 n + 1 , q 2 ) is q 2 n + 1 + 1 . Vanhove, Frédéric (2009) The Electronic Journal of Combinatorics [electronic only]
Towards the determination of the regular n -covers of P G 3 , q Martin Oxenham, Rey Casse (2003) Bollettino dell'Unione Matematica Italiana A set of lines S of P G 3 , q is said to cover a point P of P G 3 , q n times if there are exactly n lines of S incident with P . An n -cover of P G 3 , q is a set of lines of P G 3 , q which covers each point of P G 3 , q n times. In this paper, the properties and known examples of n -covers...
О регулярных множествах и коллинеациях проективных плоскостей. Н.Д. Подуфалов (1991) Algebra i Logika
О функциях на линейных пространствах, связанных с конечными проективными плоскостями. Н.Д. Подуфалов (2002) Algebra i Logika