Fontani, F., Caselli, P., Palau, A., Bizzocchi, L., & Ceccarelli, C. (2015). First measurements of 15N fractionation in N2H+ toward high-mass star-forming cores. The Astrophysical Journal Letters, 808(2):, pp. 1-7. doi:10.1088/2041-8205/808/2/L46.