@article{1102978258,
author = {Peterson, A. C.},
title = {Distribution of zeros of solutions of a fourth order differential equation.},
journal = {Pacific J. Math.},
volume = {31},
number = {3},
year = {1969},
pages = { 751-764},
language = {en},
url = {http://dml.mathdoc.fr/item/1102978258}
}
Peterson, A. C. Distribution of zeros of solutions of a fourth order differential equation.. Pacific J. Math., Tome 31 (1969) no. 3, pp. 751-764. http://gdmltest.u-ga.fr/item/1102978258/