GU Monocerotis: A high-mass eclipsing overcontact binary in the young open cluster Dolidze 25J. Lorenzo, I. Negueruela, F. Vilardell, S. Simón-Díaz, P. Pastor and M. Méndez MajuelosA&A, 590 (2016) A45DOI: https://doi.org/10.1051/0004-6361/201628224