A study of pyramidal islands formation in epitaxy within the generalized phase-field model Dmitrii O. Kharchenko, Vasyl O. Kharchenko, Tetyana Zhylenko and Alina V. Dvornichenko Eur. Phys. J. B, 86 4 (2013) 175 Published online: 22 April 2013 DOI: 10.1140/epjb/e2013-31053-1