Witchuda Vejjajiva. 1996. Bioactive constituents of Strychnos nitida G.Don Stem. Graduate School, Chulalongkorn University;
Witchuda Vejjajiva. (1996) Bioactive constituents of Strychnos nitida G.Don Stem . Chulalongkorn University/Bangkok.
Witchuda Vejjajiva. Bioactive constituents of Strychnos nitida G.Don Stem. . Bangkok:Chulalongkorn University, 1996.
Witchuda Vejjajiva. (1996) Bioactive constituents of Strychnos nitida G.Don Stem . Chulalongkorn University/Bangkok.