Chem, Shing-Shen Triads of rectilinear congruences with generators in correspondence. (English) Zbl 0010.41704 Tohoku Math. J. 40, 179-188 (1935). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Keywords:differential geometry PDFBibTeX XMLCite \textit{S.-S. Chem}, TĂ´hoku Math. J. 40, 179--188 (1935; Zbl 0010.41704)