@article{GDZPPN002038587, title = {New closure conditions and some problems in loop theory.}, journal = {Aequationes mathematicae}, volume = {41}, year = {1991}, pages = {79-84}, zbl = {0719.20037}, url = {http://dml.mathdoc.fr/item/GDZPPN002038587} }
Shelekhov, A.M. New closure conditions and some problems in loop theory.. Aequationes mathematicae, Tome 41 (1991) pp. 79-84. http://gdmltest.u-ga.fr/item/GDZPPN002038587/