Dynamics of dark solitons localized at structural defect in one-dimensional photonic lattices with defocusing saturable nonlinearityPetra P. Beličev, Goran Gligorić, Aleksandra Maluckov and Milutin StepićEPL, 104 1 (2013) 14006DOI: https://doi.org/10.1209/0295-5075/104/14006