1. Quasigroups. I;Albert, A. A.;Trans. Amer. Math. Soc.,1943
2. Quasigroups. II;Albert, A. A.;Trans. Amer. Math. Soc.,1944
3. Nets and groups;Baer, Reinhold;Trans. Amer. Math. Soc.,1939
4. Nets and groups. II;Baer, Reinhold;Trans. Amer. Math. Soc.,1940
5. The homomorphism theorems for loops;Baer, Reinhold;Amer. J. Math.,1945