(NkOMBINATORNYE PROSTRANSTWA I REKURSIWNOSTX W NIH (B/s - (NsKORDEW(B, (NdIMITRs; (NbOLGARSKAQ AKADEMIQ NAUKs ((NsOFIQ (B:s (NiZD(B-(NWO bOLG(B. (NAKAD(B. (NNAUK(B,s, 1980)
Keywords: (NkOMBINATORNYE PROSTRANSTWAs