Choban, M. M. Über Operationen an Mengen. (Russian) Zbl 0325.04003 Sib. Mat. Zh. 16, 1332-1351 (1975). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 ReviewCited in 1 Document MSC: 03E15 Descriptive set theory PDFBibTeX XMLCite \textit{M. M. Choban}, Sib. Mat. Zh. 16, 1332--1351 (1975; Zbl 0325.04003)