Comment on 'Another form of the Klein-Gordon equation'
arXiv:hep-th/0109143 · doi:10.1016/S0375-9601(01)00631-4
Abstract
It is shown that the alternative Klein-Gordon equation with positive definite probability density proposed in a letter by M.D. Kostin does not meet the requirements of relativistic (quantum) field theory and therefore does not allow for a meaningful physical interpretation.
Latex, 4 pages, to appear in Phys.Lett.A