Litchke, L., Liu, T., & Castro, S. (1969). Effects of Multimodal Mandala Yoga on Social and Emotional Skills for Youth with Autism Spectrum Disorder: An Exploratory Study. International Journal of Yoga, 11(1), 59-65. https://doi.org/10.4103/ijoy.IJOY_80_16 (Original work published 1969)