Broquen, P., Candan, F., Falbo, G., Girardin, J. L., & Apcarian, A. (2002). Pinus ponderosa Dougl. effect in soil reaction in southwestern Neuquén, Argentina. Bosque, 23(1), 47–59. https://doi.org/10.4206/bosque.2002.v23n1-05