Triggered massive star formation associated with the bubble Hii region Sh2-39 (N5)N. U. Duronea, C. E. Cappa, L. Bronfman, J. Borissova, M. Gromadzki and M. A. KuhnA&A, 606 (2017) A8DOI: https://doi.org/10.1051/0004-6361/201730528
