Chrun, Antonio Sergio, José Carlos Fachinello, and Edemar Antonio Rossetto. 1992. “Influence of the Aerial <i>burrknot< i> Galls on the Initial Development of the Apple Plants”. Pesquisa Agropecuaria Brasileira 27 (3):509-12. https://doi.org/10.1590/S1678-3921.pab1992.v27.3675.