Heller, Alex On the classification of filtered modules. (English) Zbl 0100.26502 Ill. J. Math. 5, 412-419 (1961). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document Keywords:ordered sets, lattices PDFBibTeX XMLCite \textit{A. Heller}, Ill. J. Math. 5, 412--419 (1961; Zbl 0100.26502)