4Drogoudi Pavlina D, Pantelidis Georgios.Effects of position on canopy and harvest time on fruit physicochemical and antioxidant properties in different apple cultivars[J].Scientia Horticulturae, 2011, 129(4): 752-760.
5Mavroudis Nikolaos E, Dejmek P, Sj?holm Ingegerd.Studies on some raw material characteristics in different Swedish apple varieties [J].Journal of Food Engineering, 2004, 62(2): 121-129.
6Jha S N, Rai D R, Shrama R.Physico- chemical quality parameters and overall quality index of apple during storage[J].Journal of food Science and technology, 2012, 49(5): 594-600.
7Iglesias I, Echeverr? G, Soria Y.Differences in fruit colour development, anthocyanin content and fruit quality and consumer acceptability of eight \'Gala\' apple strains[J].Scientia Horticulturae, 2008, 119(1): 32-40.
8Abbott Judith A.Quality measurement of fruits and vegetables[J].Postharvest Biology and Technology, 1999, 15(3): 207-225.
9Kim Ki-Bok, Lee Sangdae, Kim Man-Soo, et al.Determination of apple firmness by nondestructive ultrasonic measurement[J].Postharvest Biology and Technology, 2009, 52(1): 44-48.
10Dandekar A M, Defilippi B G, Uratsu S L, et al.Effect of down-regulation of ethylene biosynthesis on fruit flavor complex in apple fruit[J].Transgenic Research, 2004, 13(4): 373-384.
