A study of pyramidal islands formation in epitaxy within the generalized phase-field modelDmitrii O. Kharchenko, Vasyl O. Kharchenko, Tetyana Zhylenko and Alina V. DvornichenkoEur. Phys. J. B, 86 4 (2013) 175DOI: https://doi.org/10.1140/epjb/e2013-31053-1