@article{119929, author = {Milo\v s H\'a\v cik}, title = {Generalization of amplitude phase and accompanying differential equation}, journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica}, volume = {11}, year = {1971}, pages = {7-17}, zbl = {0261.34006}, mrnumber = {0352583}, language = {en}, url = {http://dml.mathdoc.fr/item/119929} }
Háčik, Miloš. Generalization of amplitude phase and accompanying differential equation. Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, Tome 11 (1971) pp. 7-17. http://gdmltest.u-ga.fr/item/119929/
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