https://scholion.ai/paper/articles/10.1111%2Fj.1540-6261.1970.tb00410.xhttps://scholion.ai/paper/articles/10.1111%2Fj.1540-6261.1970.tb00411.xhttps://scholion.ai/paper/articles/10.1111%2Fj.1540-6261.1970.tb00412.xhttps://scholion.ai/paper/articles/10.1111%2Fj.1540-6261.1970.tb00413.x