Author: Svoboda, Karel
- : Sur la bidéformation projective des congruences de droites. (French) [On a projective bideformation of line congruences]. Czechoslovak Mathematical Journal, vol. 20 (1970), issue 2, pp. 327
- : Sur la déformation projective des systèmes osculateurs d'une congruence de droites. (French) [On the projective deformation of osculating systems of a line congruence]. Czechoslovak Mathematical Journal, vol. 20 (1970), issue 2, pp. 315-326
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