R. Rohayati, L. L. Budiana, A. I. N. Indra, and G. Sugihartina, “DIFFERENCES IN THE STABILITY OF CHOLINESTERASE ENZYME ACTIVITY OF SERUM AND HEPARIN PLASMA SAMPLES USING PHOTOMETRIC KINETIC METHOD”, JRKPDB, vol. 16, no. 2, pp. 730-736, Oct. 2024.