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@article{ELMA_1981__36_141268, author = {O. Bottema and J.T. Groenman}, title = {On the upward motion of a double cone on an inclined plane.}, journal = {Elemente der Mathematik}, pages = {121--126}, publisher = {mathdoc}, volume = {36}, year = {1981}, zbl = {0467.53005}, url = {http://geodesic.mathdoc.fr/item/ELMA_1981__36_141268/} }
O. Bottema; J.T. Groenman. On the upward motion of a double cone on an inclined plane.. Elemente der Mathematik, Tome 36 (1981), pp. 121-126. http://geodesic.mathdoc.fr/item/ELMA_1981__36_141268/