1. Abramowitz, M., Stegun, I.A.: Handbook of Mathematical Functions: with Formulas, Graphs, and Mathematical Tables. Courier Dover Publications, USA (2012)
2. Andrianov, A., Kurkov, M., Lizzi, F.: Spectral action, Weyl anomaly and the Higgs-dilaton potential. J. High Energy Phys. 10(2011)001
3. Andrianov, A., Lizzi, F.: Bosonic spectral action induced from anomaly cancellation. J. High Energy Phys. 5(2010)057
4. Avramidi, I.: Heat Kernel Method and its Applications. Birkhäuser, Basel (2015)
5. Ball, A., Marcolli, M.: Spectral action models of gravity on packed Swiss cheese cosmology. Class. Quantum Gravity 33(11), 115018 (2016)