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Duan, Naibin; Bai, Yang; Sun, Honghe; Wang, Nan; Ma, Yumin; Li, Mingjun; Wang, Xin; Jiao, Chen et al. (2017), "Genome re-sequencing reveals the history of apple and supports a two-stage model for fruit enlargement", Nature Communications8 (1): 249, doi:10.1038/s41467-017-00336-7, PMC5557836, PMID28811498