Conditions for the normal rectilinear congruences whose focal surfaces are minimal.

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Bibliographic Details
Title:	Conditions for the normal rectilinear congruences whose focal surfaces are minimal.
Authors:	Alexiou, D.¹, Tsagas, G.², Frangakis, C.²
Source:	International Journal of Computer Mathematics. Jan2001, Vol. 77 Issue 3, p335-345. 11p.
Database:	Mathematics Source

Description
ISSN:	00207160
DOI:	10.1080/00207160108805070