H. O. Pflugfelder

Quasigroups and loops : theory and applications

Jonathan D. H. Smith, O. Chein, H. O. Pflugfelder, 1990 .

Quasigroups and loops : introduction

H. O. Pflugfelder, 1990 .

The smallest Moufang loop

O. Chein, H. O. Pflugfelder, 1971 .

Historical notes on loop theory

H. O. Pflugfelder, Hala Orlik Pflugfelder, 2000 .

On mapsx → xn and the isotopy — isomorphy property of Moufang loops

O. Chein, H. O. Pflugfelder, 1971 .

On self-adjoint subloops of moufang loops

H. O. Pflugfelder, 1974 .