https://scholion.ai/paper/articles/10.1111%2Fj.1540-6261.1970.tb00423.xhttps://scholion.ai/paper/articles/10.1111%2Fj.1540-6261.1970.tb00576.xhttps://scholion.ai/paper/articles/10.1111%2Fj.1540-6261.1970.tb00577.x