au.\*:("HALKOWSKA K")
Results 1 to 1 of 1
Selection :
ON FORMULAS PRESERVED BY THE SUM OF A DIRECT SYSTEM OF RELATIONAL SYSTEMSHALKOWSKA K; PLONKA J.1978; MATH. NACHR.; DDR; DA. 1978; VOL. 86; PP. 117-120; BIBL. 1 REF.Article
