%0 Journal Article %A E. A. Perminov %T The number of rigid graphs that are mutually nonimbeddable into one another %J Izvestiâ vysših učebnyh zavedenij. Matematika %D 1985 %P 77-78 %N 8 %I mathdoc %U http://geodesic.mathdoc.fr/item/IVM_1985_8_a13/ %G ru %F IVM_1985_8_a13