 by applying only [
 by applying only [  ] to a potential integral (with new Green\´s function) even though such an integral is, in general, to be taken over currents that are not
 ] to a potential integral (with new Green\´s function) even though such an integral is, in general, to be taken over currents that are not  -directed. It can be shown that the transformation effectively yields
 -directed. It can be shown that the transformation effectively yields  in terms of a TM representation.
 in terms of a TM representation.