Polar stellar-spots and grazing planetary transits - Possible explanation for the low number of discovered grazing planetsM. Oshagh, N. C. Santos, P. Figueira, V. Zh. Adibekyan, A. Santerne, S. C. C. Barros and J. J. G. LimaA&A, 583 (2015) L1DOI: https://doi.org/10.1051/0004-6361/201527274