
%0 Journal Article
%A Hayes, CF 
%A Craig, CD 
%T Quantization of Lagrangians for Charges in an External Field
%J Australian Journal of Physics
%D 1970/10/01
%V 23
%N 6
%P 951-952
%K 
%R https://doi.org/10.1071/PH700951
%U https://www.publish.csiro.au/paper/PH700951 
%X Generally Lagrangians in classical mechanics depend on the coordinates and velocities of the particles at one instant of time. Obviously such an approach assumes that all interactions are instantaneous, and hence that the field has an infinite velocity 
