García-Sevilla, Julia, et al. “Differential Effectiveness for Two Memory Training Programs in Older Adults With Subjective Memory Complaints (mnemonic Training Vs. Everyday Forgetfulness training): An Exploratory Analysis”. Anales De Psicología Annals of Psychology, vol. 30, no. 1, Dec. 2013, pp. 337-45, doi:10.6018/analesps.30.1.158021.