Ma G, Zhang L, Kato M, Yamawaki K, Kiriiwa Y, Yahata M, Ikoma Y, Matsumoto H. Effect of blue and red LED light irradiation on β-cryptoxanthin accumulation in the flavedo of citrus fruits. J Agric Food Chem. 2012 Jan 11;60(1):197–201. doi: 10.1021/jf203364m. PMID: 22026557.