Roberts, J. H.; Steenrod, N. E. Monontone transformations of two-dimensional manifolds. (English) Zbl 0019.37203 Ann. Math. (2) 39, 851-862 (1938). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 18 Documents Keywords:Topology × Cite Format Result Cite Review PDF Full Text: DOI