Samrat L. Sabat Layak Ali The hyperspherical acceleration effect particle swarm optimizer. 906-917 2009 9 Appl. Soft Comput. 3 https://doi.org/10.1016/j.asoc.2008.11.003 https://www.wikidata.org/entity/Q59195102 db/journals/asc/asc9.html#SabatA09