@article{120073, author = {Vladim\'\i r Vl\v cek}, title = {On functions describing a distribution of zeros of solutions of an iterated linear differential equation of the fourth order}, journal = {Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica}, volume = {18}, year = {1979}, pages = {103-116}, zbl = {0452.34028}, mrnumber = {0589852}, language = {en}, url = {http://dml.mathdoc.fr/item/120073} }
Vlček, Vladimír. On functions describing a distribution of zeros of solutions of an iterated linear differential equation of the fourth order. Acta Universitatis Palackianae Olomucensis. Facultas Rerum Naturalium. Mathematica, Tome 18 (1979) pp. 103-116. http://gdmltest.u-ga.fr/item/120073/
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