[1]
Knudsen, F.F. 1983. The projectivity of the moduli space of stable curves, III: The line bundles on $M_{g,n}$, and a proof of the projectivity of $\bar{M}_{g,n}$ in characteristic 0. MATHEMATICA SCANDINAVICA. 52, (Dec. 1983), 200–212. DOI:https://doi.org/10.7146/math.scand.a-12002.