@article{MOMA_1972__76_177593,
     author = {M.E. Watkins and Lewis A. Nowitz},
     title = {On {Graphical} {Regular} {Representations} of {Direct} {Products} of {Groups.}},
     journal = {Monatshefte f\"ur Mathematik},
     pages = {168--171},
     publisher = {mathdoc},
     volume = {76},
     year = {1972},
     zbl = {0242.05115},
     url = {http://geodesic.mathdoc.fr/item/MOMA_1972__76_177593/}
}