Nonassociative rings with a single defining relation whose elementary theories are decidable Yu. M. Vazhenin OriginalPaper Pages: 339 - 348
Schur multipliers of automorphism groups of free groups E. Ya. Markushina OriginalPaper Pages: 370 - 376
Some properties of algebraic reducibility of constructivizations S. T. Fedoryaev OriginalPaper Pages: 395 - 405
Undecidable properties of extensions of a provability logic. II A. V. Chagrov OriginalPaper Pages: 406 - 413