Connelly, Robert (1979). "The Rigidity of Polyhedral Surfaces". Mathematics Magazine. 52 (5): 275–283. doi:10.2307/2689778. JSTOR2689778.
Gluck, Herman (1975). "Almost all simply connected closed surfaces are rigid". In Glaser, Leslie Curtis; Rushing, Thomas Benjamin (eds.). Geometric Topology. Lecture Notes in Mathematics. Vol. 438. Springer Berlin Heidelberg. pp. 225–239. doi:10.1007/bfb0066118. ISBN9783540374121.
jstor.org
Connelly, Robert (1979). "The Rigidity of Polyhedral Surfaces". Mathematics Magazine. 52 (5): 275–283. doi:10.2307/2689778. JSTOR2689778.