@article{120066, author = {Stan\v ek, Svatoslav}, title = {The characteristic multipliers of a block and of an inverse block of second-order linear differential equations with $pi$-periodic coefficients}, journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica}, volume = {17}, year = {1978}, pages = {39-51}, zbl = {0424.34045}, mrnumber = {055403}, language = {en}, url = {http://dml.mathdoc.fr/item/120066} }
Staněk, Svatoslav. The characteristic multipliers of a block and of an inverse block of second-order linear differential equations with $pi$-periodic coefficients. Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, Tome 17 (1978) pp. 39-51. http://gdmltest.u-ga.fr/item/120066/
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