Low-metallicity massive single stars with rotation - Evolutionary models applicable to I Zwicky 18Dorottya Szécsi, Norbert Langer, Sung-Chul Yoon, Debashis Sanyal, Selma de Mink, Christopher J. Evans and Tyl DermineA&A, 581 (2015) A15DOI: https://doi.org/10.1051/0004-6361/201526617