7Drake S R, Elfving D C. Indicators of maturlty and storage quality of 'Lapins' sweet cherry [J] . Holt Technology, 2002, 12: 4, 687 - 691
8DRAKE S R, KUPFERMAN E M. Maturity and storage quality of 'Jonagold' apples related to starch index [ J] . Journal of American Pomolohical Sosciety, 2000, 54: 4, 213-218
9Menzel C M, Wait G K. Litchi and Longan Botany, Production and Uses [M]. USA: CABI Publishing, 2005:139
