@article{1195522957, author = {Haruki, Hiroshi}, title = {On a characteristic property of confocal conic sections}, journal = {Proc. Japan Acad.}, volume = {39}, number = {9}, year = {1963}, pages = { 564-565}, language = {en}, url = {http://dml.mathdoc.fr/item/1195522957} }
Haruki, Hiroshi. On a characteristic property of confocal conic sections. Proc. Japan Acad., Tome 39 (1963) no. 9, pp. 564-565. http://gdmltest.u-ga.fr/item/1195522957/