Learning Fricke signs from Maass form coefficients
Oliver, T., Bieri, J., Butbaia, G., Costa, E., Deines, A., Lee, K.-H., Lowry-Duda, D., Qi, Y. and Veenstra, T. 2015. Learning Fricke signs from Maass form coefficients. Advances in Theoretical and Mathematical Physics. 19 (3), pp. 701-722.