TY  - JOUR
AU  - Janez Ušan
TI  - (n,m)−Groups in the Light of the Neutral Operations
JO  - Mathematica Moravica
PY  - 2006
SP  - 107 
EP  -  147
VL  - 10
IS  - 1
PB  - mathdoc
UR  - https://geodesic-test.mathdoc.fr/item/MM3_2006_10_1_a12/
ID  - MM3_2006_10_1_a12
ER  -