Changes
<ref name="St">S. K. Stein, ''Transversals of Latin squares and their generalizations'', Pacific J. Math. 59 (1975), 567–575, [http://msp.org/pjm/1975/59-2/pjm-v59-n2-p27-s.pdf pdf link]</ref>
<ref name="KoZi">D. Kotlar, R. Ziv, ''A rainbow matching Large matchings in a bipartite graphgraphs have a rainbow matching'', [http://dx.doi.org/10.1016/j.ejc.2013.11.011 DOI link], [http://arxiv.org/abs/1305.1466 arXiv link]</ref>
<ref name="AhChHo">R. Aharoni, P. Charbit and D. Howard, ''On a Generalization of the Ryser-Brualdi-Stein Conjecture'', [http://arxiv.org/abs/1305.6164 arXiv link]</ref>
