@article{AFM_2018_43_2_a6,
     author = {James K. Langley},
     title = {Linear differential polynomials in zero-free meromorphic functions},
     journal = {Annales Fennici Mathematici},
     pages = {693--735},
     publisher = {mathdoc},
     volume = {43},
     number = {2},
     year = {2018},
     doi = {10.5186/aasfm.2018.4348},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5186/aasfm.2018.4348/}
}