Villela, F.A., Filho, L.D. and Sequeira, E.L. (1991) “Table of osmotic potential as a function of polyethilene glycol 6000 concentration and temperature”, Pesquisa Agropecuaria Brasileira, 26(11/12), pp. 1957–1968. doi:10.1590/S1678-3921.pab1991.v26.3549.