Eiesland, J. Flat-sphere geometry. III, IV. (English) JFM 47.0695.02 Tôhoku Math. J. 16, 184-235 (1919); 17, 292-330 (1920). Reviewer: Meyer, Prof. (Königsberg in Preußen) PDFBibTeX XMLCite \textit{J. Eiesland}, Tôhoku Math. J. 16, 184--235 (1920; JFM 47.0695.02)
Eiesland, J. Flat-sphere geometry. (English) JFM 46.1132.01 American M. S. Bull. 22, 275 (1916), 23, 63-64; American J. 40, 1-46 (1916). Reviewer: Meyer, Prof. (Königsberg i. Pr.) PDFBibTeX XMLCite \textit{J. Eiesland}, Bull. Am. Math. Soc. 22, 275 (1916; JFM 46.1132.01)