@article{10_4064_ap_17_2_137_140,
     author = {Q. I. Rahman},
     title = {The {Ritt} order of the derivative of an entire function},
     journal = {Annales Polonici Mathematici},
     pages = {137--140},
     publisher = {mathdoc},
     volume = {17},
     number = {2},
     year = {1965},
     doi = {10.4064/ap-17-2-137-140},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-17-2-137-140/}
}