Chemical structure and growth regulating activity of some esters of meta and para allythioureido benzoic acid and phenylthioureido benzoic acid cucumber d wheat m Karanov, E.N.; Vassilev, G.N.; Tancheva, S.N. Dokladi na B"lgarskata Akademiya na Naukite 20(11): 1197-1200 1967 https://eurekamag.com/research/024/318/024318001.php