@article{ARM_1998__34_1_a2,
     author = {Bartu\v{s}ek, Miroslav and Do\v{s}l\'a, Zuzana and Graef, John R.},
     title = {The nonlinear limit-point/limit-circle problem for higher order equations},
     journal = {Archivum mathematicum},
     pages = {13--22},
     publisher = {mathdoc},
     volume = {34},
     number = {1},
     year = {1998},
     mrnumber = {1629644},
     zbl = {0914.34023},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1998__34_1_a2/}
}