@article{GDZPPN001253212, title = {Interpolation property in semigroups.}, journal = {Semigroup forum}, volume = {18}, year = {1979}, pages = {337-350}, zbl = {0425.20055}, url = {http://dml.mathdoc.fr/item/GDZPPN001253212} }
Kollár, J. Interpolation property in semigroups.. Semigroup forum, Tome 18 (1979) pp. 337-350. http://gdmltest.u-ga.fr/item/GDZPPN001253212/