Literature 13: Sun Guiying. The Relationship Between Nectariferous Plant Pollen and Honey Quality, and Pollen Identification. Modern Commodity Inspection Science and Technique. 1996,6(1):15-22. Literature in Chinese, download from:蜜源植物花粉与蜂蜜品质的关系及花粉的鉴定 - 中国知网
