However, Wang indicates that "the Landau-Lifshitz version of Laue's theorem (where the divergence-less of a four-tensor is taken as a sufficient condition) and Weinberg's version of Laue's theorem (where the divergence-less plus a symmetry is taken as a sufficient condition) are both flawed", while "Møller's version of Laue's theorem, where the divergence-less plus a "zero-boundary condition" is taken as a sufficient condition, has a very limited application". In a recent study, Wang further indicates that Møller's version of Laue's theorem is also found to be flawed, because the divergence-less plus a zero-boundary condition is not a sufficient condition.