J. J. Wang; A. D. Scott (2001). Determination of exchangeable potassium in soil using ion-selective electrodes in soil suspensions. , 52(1), 143–150.
doi:10.1046/j.1365-2389.2001.t01-1-00363.x
url to share this paper:
An interview with Sci-Hub Founder Alexandra Elbakyan Who exactly should pay for academic research