@article{CRMATH_2014__352_1_21_0,
     author = {Xu, Yan and Qiu, Huiling},
     title = {Two results on \protect\emph{\ensuremath{\varphi}}-normal functions},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {21--25},
     publisher = {Elsevier},
     volume = {352},
     number = {1},
     year = {2014},
     doi = {10.1016/j.crma.2013.11.010},
     language = {en},
     url = {http://www.numdam.org/articles/10.1016/j.crma.2013.11.010/}
}