de Barros, I. and Pasqual, M. 1992. PH variation of MS medium for <i>In vitro</i> culture depending on agar concentration and initial pH. Pesquisa Agropecuaria Brasileira. 27, 11 (Nov. 1992), 1513–1517. DOI:https://doi.org/10.1590/S1678-3921.pab1992.v27.3798.