Spehar, C.R. and Makita, M. 1994. Aluminium tolerance in soybean seedlings and its utilization. Pesquisa Agropecuaria Brasileira. 29, 12 (Dec. 1994), 1927–1932. DOI:https://doi.org/10.1590/S1678-3921.pab1994.v29.4250.