@article{paperid:1058515,
author = {Azam Pourmizaei and Hassanzadeh, Mitra and Mashayekhy Fard, Behrooz},
title = {On Relative Central Extensions and Covering Pairs},
journal = {Journal of Algebraic Systems},
year = {2016},
volume = {4},
number = {1},
month = {September},
issn = {2345-5128},
pages = {1--13},
			numpages = {12},
keywords = {Pair of groups; Covering pair; Relative central extension; Isoclinism of pairs of groups.},
}