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2. A quick and simple method for the routine determination of acetyl- and butyrylcholinesterase in blood;Bellino;Br. J. ind. Med.,1978
3. Enzymes of human saliva, the determination, distribution and origin of whole saliva enzymes;Chauncey;J. dent. Res.,1954
4. Colorimetric determination of serum cholinesterase and its genetic variants by the propionylthiocholine dithiobis (nitrobenzoic acid) procedure;Dietz;Clin. Chem.,1973
5. Cholinesterase activity in blood serum and saliva of female workers in contact with pesticides;Dryankova;Stomatology (Sofia),1981