4Moniruzzaman M, Mozumder S N, Islam M R. Effect of mulching and pruning on yield and quality of pear[J]. Bangladesh Journal of Agricultural Research, 2007, 32(2):225-233.
5Neff D, Savini G, Massetani F, et al. Pear pruning and training for economically sustainable production[C]. Acta horticulturae. 2008, 800 (2):747.