W. Barbosa, F. A. Campo-Dall'orto, M. Ojima, and T. Igue, “6-Benzylaminopurine (BAP) concentration on shoot proliferation of ’Gala’ apple in vitro”, PAB, vol. 25, no. 5, pp. 747–751, Apr. 2014, doi: 10.1590/S1678-3921.pab1990.v25.13491.