Corredato, Roberto Aparecido, Ubirajara Contro Malavasi, and Marlene de Matos Malavasi. 2014. “Effect of Tapping Frequency Upon Productivity of Different Rubber Tree”. Scientia Agraria Paranaensis 13 (4):318-22. https://doi.org/10.18188/sap.v13i4.7846.