Almeida Costa, A. Über die Fastgruppentheorie. (German) Zbl 0072.25401 Univ. Lisboa, Rev. Fac. Ci., II. Ser. A 5, 265-328 (1956). Reviewer: A. Sade MSC: 20N05 PDF BibTeX XML Cite \textit{A. Almeida Costa}, Univ. Lisboa, Revista Fac. Ci., II. Ser., A 5, 265--328 (1956; Zbl 0072.25401) OpenURL
Smiley, M. F. An application of lattice theory to quasigroups. (English) Zbl 0063.07085 Bull. Am. Math. Soc. 50, 782-786 (1944). MSC: 20N05 PDF BibTeX XML Cite \textit{M. F. Smiley}, Bull. Am. Math. Soc. 50, 782--786 (1944; Zbl 0063.07085) Full Text: DOI OpenURL