Freedman, Michael; Lovász, László; Schrijver, Alexander (2007). "Reflection positivity, rank connectivity, and homomorphism of graphs". Journal of the American Mathematical Society (англ.). 20 (01): 37—52. arXiv:math/0404468. doi:10.1090/S0894-0347-06-00529-7. ISSN0894-0347. MR2257396.
arxiv.org
Freedman, Michael; Lovász, László; Schrijver, Alexander (2007). "Reflection positivity, rank connectivity, and homomorphism of graphs". Journal of the American Mathematical Society (англ.). 20 (01): 37—52. arXiv:math/0404468. doi:10.1090/S0894-0347-06-00529-7. ISSN0894-0347. MR2257396.
Freedman, Michael; Lovász, László; Schrijver, Alexander (2007). "Reflection positivity, rank connectivity, and homomorphism of graphs". Journal of the American Mathematical Society (англ.). 20 (01): 37—52. arXiv:math/0404468. doi:10.1090/S0894-0347-06-00529-7. ISSN0894-0347. MR2257396.
Kuchment, Peter; Kunyansky, Leonid (2002). "Differential Operators on Graphs and Photonic Crystals". Advances in Computational Mathematics. 16 (24): 263—290. doi:10.1023/A:1014481629504.
worldcat.org
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Freedman, Michael; Lovász, László; Schrijver, Alexander (2007). "Reflection positivity, rank connectivity, and homomorphism of graphs". Journal of the American Mathematical Society (англ.). 20 (01): 37—52. arXiv:math/0404468. doi:10.1090/S0894-0347-06-00529-7. ISSN0894-0347. MR2257396.