M. W. Schuch and J. A. Peters, “Multiplication In vitro of apple shoots marubakaido (Malus prunifolia Willd, Borkh) and megumi (Malus domestica Borkh) cultivars”, PAB, vol. 28, no. 4, pp. 433–437, Apr. 1993, doi: 10.1590/S1678-3921.pab1993.v28.3894.