Ladda Thitithanaphuk. 1995. Chemical constituents from the Thai marine sponge biemna fortis. Graduate School, Chulalongkorn University;
Ladda Thitithanaphuk. (1995) Chemical constituents from the Thai marine sponge biemna fortis . Chulalongkorn University/Bangkok.
Ladda Thitithanaphuk. Chemical constituents from the Thai marine sponge biemna fortis. . Bangkok:Chulalongkorn University, 1995.
Ladda Thitithanaphuk. (1995) Chemical constituents from the Thai marine sponge biemna fortis . Chulalongkorn University/Bangkok.