@article{120301, author = {Pavel Cal\'abek}, title = {A four-point problem for second-order differential systems}, journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica}, volume = {33}, year = {1994}, pages = {7-15}, zbl = {0845.34030}, mrnumber = {1385740}, language = {en}, url = {http://dml.mathdoc.fr/item/120301} }
Calábek, Pavel. A four-point problem for second-order differential systems. Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, Volume 33 (1994) pp. 7-15. http://gdmltest.u-ga.fr/item/120301/
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