@article{Goncharova_2008, place={Харків, Україна}, title={Ruled Surfaces in E4 with Constant Ratio of the Gaussian Curvature and Gaussian Torsion}, volume={4}, url={http://jmag.ilt.kharkov.ua/index.php/jmag/article/view/jm04-0371e}, abstractNote={Local and global existence theorems on the ruled surfaces with a constant ratio of the Gaussian curvature and Gaussian torsion are proved.Mathematics Subject Classification: 53A07.}, number={3}, journal={Журнал математичної фізики, аналізу, геометрії}, author={Goncharova, O. A.}, year={2008}, month={Лип}, pages={371–379} }