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Urrutia, L. F. Spontaneous Lorentz symmetry breaking in nonlinear electrodynamics. (English) Zbl 1241.78040 Kostelecký, V. Alan (ed.), CPT and Lorenz symmetry. Proceedings of the 5th meeting, Bloomington, IN, USA, 28 June – 2 July 2010. Hackensack, NJ: World Scientific (ISBN 978-981-4327-67-1/hbk; 978-981-4327-68-8/ebook). 25-29 (2011). MSC: 78A60 81R40 PDFBibTeX XMLCite \textit{L. F. Urrutia}, in: CPT and Lorenz symmetry. Proceedings of the 5th meeting, Bloomington, IN, USA, 28 June -- 2 July 2010. Hackensack, NJ: World Scientific. 25--29 (2011; Zbl 1241.78040) Full Text: arXiv Link
Urrutia, L. F.; Manterola, C. Propagator for anisotropic three-dimensional charged harmonic oscillator in a constant magnetic field using the Schwinger action principle. (English) Zbl 0617.70022 Int. J. Theor. Phys. 25, 75-88 (1986). Reviewer: P.Achuthan MSC: 70H99 81Q99 78A35 81V10 PDFBibTeX XMLCite \textit{L. F. Urrutia} and \textit{C. Manterola}, Int. J. Theor. Phys. 25, 75--88 (1986; Zbl 0617.70022) Full Text: DOI