@article(bell64,
 author       = {John S. Bell},
 year         = {1964},
 title        = {On the Einstein-Podolsky-Rosen paradox},
 journal      = {Physics},
 volume       = {1},
 pages        = {195--200},
 doi          = {10.1103/PhysicsPhysiqueFizika.1.195},
)
@article(bell66,
 author       = {John S. Bell},
 year         = {1966},
 title        = {On the problem of hidden variables in quantum mechanics},
 journal      = {Reviews of Modern Physics},
 volume       = {38},
 pages        = {447--452},
 doi          = {10.1103/RevModPhys.38.447},
)
@book(spectral,
 author       = {Michael S. Birman and Michael Z. Solomjak},
 year         = {1987},
 title        = {Spectral Theory of Self-Adjoint Operators in Hilbert Space},
 publisher    = {Reidel},
 note         = {Originally in Russian, Leningrad University Press, 1980},
)
@article(G234,
 author       = {Andreas Blass and Yuri Gurevich},
 year         = {July 2017},
 title        = {Common denominator for value and expectation no-go theorems},
 note         = {\write\rebib { url = "arXiv:1707.07368",}},
)
@article(G226,
 author       = {Andreas Blass and Yuri Gurevich},
 year         = {March 2015},
 title        = {Spekkens's Symmetric No-Go Theorem},
 note         = {\write\rebib { url = "arXiv:1503.08084",}},
)
@article(G228,
 author       = {Andreas Blass and Yuri Gurevich},
 year         = {Sept. 2015},
 title        = {On Hidden Variables: Value and Expectation No-Go Theorems},
 note         = {\write\rebib { url = "arXiv:1509.06896",}},
)
@article(bugajski,
 author       = {S\l awomir Bugajski},
 year         = {1993},
 title        = {Classical frames for a quantum theory---a bird's-eye view},
 journal      = {International Journal of Theoretical Physics},
 volume       = {32},
 pages        = {969--977},
 doi          = {10.1007/BF01215303},
)
@article(ferrieA,
 author       = {Christopher Ferrie and Joseph Emerson},
 year         = {2008},
 title        = {Frame representations of quantum mechanics and the necessity of negativity in quasi-probability representations},
 journal      = {Journal of Physics A: Mathematical and Theoretical},
 volume       = {41},
 eid          = {352001},
 doi          = {10.1088/1751-8113/41/35/352001},
 note         = {See also \write\rebib { url = "arXiv:0711.2658",}},
)
@article(ferrieB,
 author       = {Christopher Ferrie and Joseph Emerson},
 year         = {2009},
 title        = {Framed Hilbert space: hanging the quasi-probability pictures of quantum theory},
 journal      = {New Journal of Physics},
 volume       = {11},
 eid          = {063040},
 doi          = {10.1088/1367-2630/11/6/063040},
 note         = {See also \write\rebib { url = "arXiv:0903.4843",}},
)
@article(ferrieC,
 author       = {Christopher Ferrie and Ryan Morris and Joseph Emerson},
 year         = {2010},
 title        = {Necessity of negativity in quantum theory},
 journal      = {Physical Review A},
 volume       = {82},
 eid          = {044103},
 doi          = {10.1103/PhysRev.40.749},
 note         = {See also \write\rebib { url = "arXiv:0910.3198",}},
)
@article(heino,
 author       = {Teiko Heinosaari},
 year         = {2013},
 title        = {A simple sufficient condition for the coexistence of quantum effects},
 journal      = {Journal of Physics A: Mathematical and Theoretical},
 volume       = {46},
 eid          = {152002},
 doi          = {10.1088/1751-8113/46/15/152002},
)
@article(ks,
 author       = {Simon Kochen and Ernst Specker},
 year         = {1967},
 title        = {The problem of hidden variables in quantum mechanics},
 journal      = {Journal of Mathematics and Mechanics},
 volume       = {17},
 pages        = {59--87},
)
@article(mermin,
 author       = {N. David Mermin},
 year         = {1993},
 title        = {Hidden variables and the two theorems of John Bell},
 journal      = {Reviews of Modern Physics},
 volume       = {65},
 pages        = {803--815},
 doi          = {10.1103/RevModPhys.65.803},
)
@book(schatten,
 author       = {Robert Schatten},
 year         = {1970},
 title        = {Norm ideals of completely continuous operators},
 publisher    = {Springer Verlag},
 doi          = {10.1007/978-3-662-35155-0},
 note         = {2nd edition},
)
@article(spekkens,
 author       = {Robert W. Spekkens},
 year         = {2008},
 title        = {Negativity and contextuality are equivalent notions of nonclassicality},
 journal      = {Physics Review Lettters},
 volume       = {101(2)},
 eid          = {020401},
 doi          = {10.1103/PhysRevLett.101.020401},
 note         = {See also \write\rebib { url = "arXiv:0710.5549",}},
)