@article{AIHPA_1972__17_3_291_0,
     author = {Chang, S. C. and Janis, Allen I.},
     title = {A note on {Perng's} unified field theory},
     journal = {Annales de l'institut Henri Poincar\'e. Section A, Physique Th\'eorique},
     pages = {291--293},
     publisher = {Gauthier-Villars},
     volume = {17},
     number = {3},
     year = {1972},
     mrnumber = {323284},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1972__17_3_291_0/}
}