@article{120191, author = {Stan\v ek, Svatoslav}, title = {On the Floquet theory of differential equations $y''=Q(t)y$ with a complex coefficient of the real variable}, journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica}, volume = {27}, year = {1988}, pages = {149-183}, zbl = {0699.34039}, mrnumber = {1039888}, language = {en}, url = {http://dml.mathdoc.fr/item/120191} }
Staněk, Svatoslav. On the Floquet theory of differential equations $y''=Q(t)y$ with a complex coefficient of the real variable. Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, Tome 27 (1988) pp. 149-183. http://gdmltest.u-ga.fr/item/120191/
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