Chrun, A. S., Fachinello, J. C., & Rossetto, E. A. (1992). Influence of the aerial burrknot galls on the initial development of the apple plants. Pesquisa Agropecuaria Brasileira, 27(3), 509-512. https://doi.org/10.1590/S1678-3921.pab1992.v27.3675