Bouy, H.; Huélamo, N.; Barrado Y Navascués, D.; Martín, E. L.; Petr-Gotzens, M. G.; Kolb, J.; Marchetti, E.; Morales-Calderón, M.; Bayo, A.; Artigau, E.; Hartung, M.; Marchis, F.; Tamura, M.; Sterzik, M.; Köhler, R.; Ivanov, V. D.; Nürnberger, D. (Eylül 2009), "A deep look into the core of young clusters. II. λ-Orionis", Astronomy and Astrophysics, 504 (1), ss. 199-209, arXiv:0907.0322 $2, Bibcode:2009A&A...504..199B, doi:10.1051/0004-6361/200912569
Bouy, H.; Huélamo, N.; Barrado Y Navascués, D.; Martín, E. L.; Petr-Gotzens, M. G.; Kolb, J.; Marchetti, E.; Morales-Calderón, M.; Bayo, A.; Artigau, E.; Hartung, M.; Marchis, F.; Tamura, M.; Sterzik, M.; Köhler, R.; Ivanov, V. D.; Nürnberger, D. (Eylül 2009), "A deep look into the core of young clusters. II. λ-Orionis", Astronomy and Astrophysics, 504 (1), ss. 199-209, arXiv:0907.0322 $2, Bibcode:2009A&A...504..199B, doi:10.1051/0004-6361/200912569
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