TY - JOUR TI - A new and rapid colorimetric determination of acetylcholinesterase activity AU - George L. Ellman AU - K. Diane Courtney AU - Valentino Andres AU - Robert M. Featherstone PY - 1961 JO - Biochemical Pharmacology DO - 10.1016/0006-2952(61)90145-9 UR - https://doi.org/10.1016/0006-2952(61)90145-9 ER -