Hoai Anh, Thieu, AND 		Luan, Le.
" ưsing improved Non Ri -Maprec assay to detect virulence mutations in poliomyelitis Vaccine viruses: advantages over  rctA0 test" <em>VNU Journal of Science: Natural Sciences and Technology</em> [Online], Volume 23 Number 3 (15 September 2007)