Seeliger, M.; Kitze, M.; Errmann, R.; Richter, S.; Ohlert, J. M.; Chen, W. P.; Guo, J. K.; Göğüș, E.; Güver, T. (), „Ground-based transit observations of the HAT-P-18, HAT-P-19, HAT-P-27/WASP40 and WASP-21 systems”, Monthly Notices of the Royal Astronomical Society, 451 (4), pp. 4060–4072, arXiv:1508.06215, Bibcode:2015MNRAS.451.4060S, doi:10.1093/mnras/stv1187Mentenanță CS1: display-autori (link)
Seeliger, M.; Kitze, M.; Errmann, R.; Richter, S.; Ohlert, J. M.; Chen, W. P.; Guo, J. K.; Göğüș, E.; Güver, T. (), „Ground-based transit observations of the HAT-P-18, HAT-P-19, HAT-P-27/WASP40 and WASP-21 systems”, Monthly Notices of the Royal Astronomical Society, 451 (4), pp. 4060–4072, arXiv:1508.06215, Bibcode:2015MNRAS.451.4060S, doi:10.1093/mnras/stv1187Mentenanță CS1: display-autori (link)
Seeliger, M.; Kitze, M.; Errmann, R.; Richter, S.; Ohlert, J. M.; Chen, W. P.; Guo, J. K.; Göğüș, E.; Güver, T. (), „Ground-based transit observations of the HAT-P-18, HAT-P-19, HAT-P-27/WASP40 and WASP-21 systems”, Monthly Notices of the Royal Astronomical Society, 451 (4), pp. 4060–4072, arXiv:1508.06215, Bibcode:2015MNRAS.451.4060S, doi:10.1093/mnras/stv1187Mentenanță CS1: display-autori (link)