@article{articled22b2426,
title   = {Existence results for abstracts fractional differential equations with nonlocal conditions via resolvent operators},
author = {Hernandez, Eduardo and O'Regan, Donal and Balachandran, Krishnan},
year = {2013},
doi = {10.1016/j.indag.2012.06.007},
journal   = {Indagationes Mathematicae}
}