Birkhoff, George D. On drawings composed of uniform straight lines. (English) Zbl 0024.28501 J. Math. Pures Appl., IX. Sér. 19, 221-236 (1940). PDFBibTeX XMLCite \textit{G. D. Birkhoff}, J. Math. Pures Appl. (9) 19, 221--236 (1940; Zbl 0024.28501)
Birkhoff, G. D. On drawings composed of uniform straight lines. (English) JFM 66.0488.01 J. math. pur. appl., Paris, (9) 19, 221-236 (1940). Reviewer: Doetsch, G., Prof. (Freiburg im Breisgau) PDFBibTeX XMLCite \textit{G. D. Birkhoff}, J. Math. Pures Appl. (9) 19, 221--236 (1940; JFM 66.0488.01)