@article{MZ_1964__85_170293,
     author = {Alfred L. Foster and Alden F. Pixley},
     title = {Semi-categorical algebras. {II.}},
     journal = {Mathematische Zeitschrift},
     pages = {169--184},
     publisher = {mathdoc},
     volume = {85},
     year = {1964},
     zbl = {0121.26505},
     url = {http://geodesic.mathdoc.fr/item/MZ_1964__85_170293/}
}