A Mild and Efficient Synthesis of 4,5-Disubstituted 3-Amino-4-hydroxythiazolidine-2-thiones and S,N-Disubstituted 1,3,4-Thiadiazole-2-thiones - Ge, Ze-mei ; Cui, Jia-ling ; Wang, Yan-ling ; Cheng, Tie-ming ; Li, Run-tao (Synthesis, 2004)