Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{SF_1977__15_134255, author = {K. Byleen and P. Komj\'ath}, title = {The admissable trace problem for {E-unitary} inverse semigroups.}, journal = {Semigroup forum}, pages = {235--246}, publisher = {mathdoc}, volume = {15}, year = {1977}, zbl = {0379.20050}, url = {http://geodesic.mathdoc.fr/item/SF_1977__15_134255/} }
K. Byleen; P. Komjáth. The admissable trace problem for E-unitary inverse semigroups.. Semigroup forum, Tome 15 (1977), pp. 235-246. http://geodesic.mathdoc.fr/item/SF_1977__15_134255/