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@article{JMAG_2009_5_a2, author = {V. O. Gorkavyy and O. M. Nevmerzhitska}, title = {Ruled surfaces as pseudospherical congruences}, journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii}, pages = {359--374}, publisher = {mathdoc}, volume = {5}, year = {2009}, language = {en}, url = {http://geodesic.mathdoc.fr/item/JMAG_2009_5_a2/} }
V. O. Gorkavyy; O. M. Nevmerzhitska. Ruled surfaces as pseudospherical congruences. Žurnal matematičeskoj fiziki, analiza, geometrii, Tome 5 (2009), pp. 359-374. http://geodesic.mathdoc.fr/item/JMAG_2009_5_a2/