Andre, V., Arefi, F., Amouroux, J., Depuydt, Y., Bertrand, P., Lorang, G., & Delamar, M. (1989). Insitu Metallization of Polypropylene Films Pretreated in a Nitrogen Or Ammonia Low-pressure Plasma. Thin Solid Films, 181, 451-460. https://doi.org/10.1016/0040-6090(89)90514-2 (Original work published 1989)