@article{paperid:201895, author = {Mashayekhy Fard, Behrooz and -, -}, title = {on Nc- covering groups of a nilpotent product of cyclic groupd}, journal = {International Journal of Mathematics, Game Theory and Algebra}, year = {2003}, month = {January}, issn = {1060-9881}, keywords = {Generalized covering group; nilpotent product; Baer-invariant.}, }