The Journal of Controlled Release was published in 1984 by Elsevier.
The Journal of Controlled Release was published in 1984 by Elsevier. On the occasion of the 25th anniversary of the journal, it was announced that among 5,217 papers, two of the three most cited papers in this journal are the well-known contributions of Phil Ritger and Nicholas Peppas that introduced the exponential equation for the analysis of relaxation and diffusion-controlled release behavior from swellable and non-swellable delivery systems. The paper "A simple equation for description of solute release. II: Fickian and anomalous release from swellable devices", published in 1987, in volume 5, pp. 37-42, has 687 citations and is ranked first among all papers of the journal, while the first part of the same work "A simple equation for description of solute release. I: Fickian and non-Fickian release from non-swellable devices in the form of slabs, spheres, cylinders or discs", published also in 1987, in volume 5, pp. 23-36, has 564 citations and is ranked third. The exponential equation was actually introduced in a simple form in a 1985 publication in Pharmaceutica Acta Helvetiae by Prof. Peppas, but it was in these two 1987 papers out of the MS thesis of Phil Ritger that the full mathematical analysis for all geometries was presented.
