Protective Effects of Ursolic Acid Extract from Ledum Pulastre L. against Genetic
GUAN Shuang, LU Jing, LIU Jing-bo,
Carcinogenesis, Teratogenesis & Mutagenesis . 2009, (1): 68 -069 .  DOI: 10.3969/j.issn.1004-616x.2009.01.017