RĂºbia, A. C., Sobrinho, J. A., & Abreu, C. P. de. (1976). Plant density and pruning effects on leaf production of Morus alba cultivars . Anais Da Escola Superior De Agricultura Luiz De Queiroz, 33, 321-328. https://doi.org/10.1590/S0071-12761976000100029