O.P. Zandron, P.A. Turner
      First order Lagrangians and path integral quantization for Hubbard operators
      Advanced Studies in Theoretical Physics, Vol. 10, 2016, no. 4, 173-200
      http://dx.doi.org/10.12988/astp.2016.512115
Copyright © 2016 O.P. Zandron and P.A. Turner. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.