Pv. Landshoff et P. Vannieuwenhuizen, CANONICAL QUANTIZATION IN N-CENTER-DOT-A=0 GAUGES, Physical review. D. Particles and fields, 50(6), 1994, pp. 4157-4161
We give a unified derivation of the propagator in the gauges n.A=0 for
n(2) timelike, spacelike, or lightlike. We discuss the physical state
s and other physical questions.