@article{EJDE_2014__2014__a9,
     author = {Xu,  Hong-Yan and Tu,  Jin},
     title = {Oscillation of meromorphic solutions to linear differential equations with coefficients of \([p,q]\)-order},
     journal = {Electronic journal of differential equations},
     year = {2014},
     volume = {2014},
     zbl = {1294.34081},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2014__2014__a9/}
}