@article{01538432,
title = {On the Ritt order and type of a certain class of functions defined by },
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {22},
year = {1999},
pages = {445-458},
doi = {10.1155/S0161171299224453},
zbl = {0963.30003},
language = {en},
url = {http://dml.mathdoc.fr/item/01538432}
}
Berland, Marcel. On the Ritt order and type of a certain class of functions defined by . International Journal of Mathematics and Mathematical Sciences, Tome 22 (1999) pp. 445-458. doi : 10.1155/S0161171299224453. http://gdmltest.u-ga.fr/item/01538432/