@article{MZ_1986__192_173760,
     author = {Simon Hellerstein and John Rossi},
     title = {Zeros of {Meromorphic} {Solutions} of {Second} {Order} {Linear} {Differential} {Equations.}},
     journal = {Mathematische Zeitschrift},
     pages = {603--612},
     publisher = {mathdoc},
     volume = {192},
     year = {1986},
     zbl = {0678.34007},
     url = {http://geodesic.mathdoc.fr/item/MZ_1986__192_173760/}
}