https://www.ahamoku.org/wp-content/uploads/2011/12/Malo-David-Hawaiian_Antiquities-Moolelo-Hawaii-translated-by-N-B-Emerson-Honolulu-Hawaiian-Gazette-Co-Ltd-1903.pdf
https://edcs640m.wordpress.com/wp-content/uploads/2017/12/sterling_summers_1978_sites-of-oahu.pdf
https://coe.hawaii.edu/ethnomath/wp-content/uploads/sites/12/2019/10/%E2%80%98Ulu-Maika-Work-and-Power.pdf
https://islandscene.com/rebirth-of-ulu-maika
https://healthandfitnesshistory.com/ancient-sports/ancient-hawaiian-ulu-maika-bowling/