Brownstein's Whole-Partial Derivatives: The Case of the Lorentz Gauge
  In this brief note we show that the usual Lorentz gauge is not satisfied by the Lienard-Wiechert potentials, then, using Brownstein's concept of "whole-partial" derivatives we introduce the generalized expression for the Lorentz gauge showing that it is satisfied by the LW-potentials. 
A. Chubykalo, A. Espinoza and R. Flores-Alvarado