Main concepts and de nitions can be found in [1, 4, 6]. De nition 1. Quasigroup (Q;
) is unipotent if and only if x
x = a for all x 2 Q and some xed element a 2 Q. De nition 2. Quasigroup (Q;
) has right unit element (a right unit) if there exists element e (unique) such that x
e = x for all x 2 Q. De nition 3. A quasigroup (Q;
) is said to be Neumann quasigroup if in this quasigroup the identity x
(yz
yx) = z (1) holds true [3, 5, 2], [7, p. 248]. In the articles [3, 7, 2] the following result is pointed out.