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