A. A. Gonchar, G. I. Marchuk, S. P. Novikov, “Vasilii Sergeevich Vladimirov (on his seventieth birthday)”, Russian Math. Surveys, 48:1 (1993), 201–212
V. M. Simulik, “Connection between the symmetry properties of the Dirac and Maxwell equations. Conservation laws”, Theoret. and Math. Phys., 87:1 (1991), 386–393
I. Yu. Krivsky, V. M. Simulik, “Noether analysis of zilch conservation laws and their generalization for the electromagnetic field. I. Use of different formulations of the principle of least action”, Theoret. and Math. Phys., 80:2 (1989), 864–874