Literature 6: Yang Juan;Huang Xing Qiu;Zeng Qingwei;Lei Shuming. Six Honeys Analysis with Melissopalynology and Amylase Activity.Journal of bee, 2021,12: 16-19. Literature in Chinese, download from: 六种蜂蜜的孢粉学和淀粉酶活性分析 - 中国知网