@article{AIHPA_1994__60_2_241_0,
     author = {Ichinose, Wataru},
     title = {On essential self-adjointness of the relativistic hamiltonian of a spinless particle in a negative scalar potential},
     journal = {Annales de l'I.H.P. Physique th\'eorique},
     pages = {241--252},
     publisher = {Gauthier-Villars},
     volume = {60},
     number = {2},
     year = {1994},
     mrnumber = {1270297},
     zbl = {0791.47054},
     language = {en},
     url = {http://www.numdam.org/item/AIHPA_1994__60_2_241_0/}
}