Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Kuwano S,Further studies on competition of berberine with pyridoxal phosphate in the tryptophanase system of Escherichia coli,Chemical and pharmaceutical bulletin,00092363,Tokyo : Pharmaceutical Society of Japan,1961-08,9,8,????,https://cir.nii.ac.jp/crid/1520291855623408640,