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https://arxiv.org/abs/quant-ph/0410222.pdf
(accessed on 25 March 2009); Adler, S. L. Quantum Theory as an Emergent Phenomenon. (Cambridge: Cambridge University Press) 2004 ch 6. Alternative choices of the correlation function are discussed in Weber, T. Quantum mechanics with spontaneous localization revisited. Nuovo Cimento B 1991106, 1111.
2. Fu, Q. Spontaneous radiation of free electrons in a nonrelativistic collapse model. Phys. Rev. A 1997, 56, 1806.
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