Spontaneous Pupillary Oscillation Signal Analysis Applying Hilbert Huang Transform. - Fabiola M. Villalobos-Castaldi; José Ruiz-Pinales; Nicolás C. Kemper-Valverde; Mercedes Flores-Flores; Laura G. Ramírez-Sánchez; Metztli G. Ortiz-Hernández (BIOSIGNALS, 2016)