@article{JNSA_2017_10_11_a11,
     author = {Bai, Yunru  and Kong, Hua },
     title = {Existence of solutions for nonlinear {Caputo-Hadamard} fractional  differential equations via the method of upper and lower solutions },
     journal = {Journal of nonlinear sciences and its applications},
     pages = {5744-5752},
     publisher = {mathdoc},
     volume = {10},
     number = {11},
     year = {2017},
     doi = {10.22436/jnsa.010.11.12},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.22436/jnsa.010.11.12/}
}