Yuliati, Yuliati, et al. “PENGARUH SENAM OTAK (BRAIN GYM) TERHADAP FUNGSI KOGNITIF PADA LANSIA DI RT 03 RW 01 KELURAHAN TANDES SURABAYA”. Journal of Health Sciences, vol. 10, no. 1, Aug. 2017, doi:10.33086/jhs.v10i1.149.