Stellar collisions in flattened and rotating Population III star clustersM. Z. C. Vergara, D. R. G. Schleicher, T. C. N. Boekholt, B. Reinoso, M. Fellhauer, R. S. Klessen and N. W. C. LeighA&A, 649 (2021) A160DOI: https://doi.org/10.1051/0004-6361/202140298