Mangueira, Dulcidio de Souza, and Alain M. B. Passerat de Silans. “A Transpirometer - Theoretical Principles and Technical Feasibility”. Pesquisa Agropecuaria Brasileira, vol. 30, no. 5, May 1995, pp. 621-32, doi:10.1590/S1678-3921.pab1995.v30.4346.