N. Aquino et al., SUPERPOTENTIAL FOR THE LIENARD-WIECHERT FIELD, Nuovo cimento della Societa italiana di fisica. B, Relativity, classical and statistical physics, 108(10), 1993, pp. 1081-1085
Using Newman-Unti coordinates, we obtain the superpotential for the ra
diative part of the Lienard-Wiechert electromagnetic field generated b
y an arbitrarily moving charge in the Minkowski space.