José M. de Albornoz-Caratozzolo 
and Felipe Cervantes-Sodi
Universidad Iberoamericana, Physics and Mathematics Department, Prol. Paseo de la Reforma 880, Lomas de Santa Fe, Ciudad de México, Mexico. E-mail: [email protected]; Tel: +52 55 59504275.
Received 5th May 2023, Accepted 30th September 2023.
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