The relation between expressions for time-dependent electromagnetic fields given by Jefimenko and by Panofsky and Phillips
The expressions of Jefimenko, which have received much recent attention in this Journal, are contained in Sec. 14.3 of the book Classical Electricity and Magnetism by Panofsky and Phillips. The latter develop these expressions further into a form that gives greater emphasis to the radiation fields. This article presents a derivation of the various expressions and discusses an apparent paradox in applying Panofsky and Phillips's result to static situations.