URL: https://www.reasonablefaith.org/question-answer/P390/necessity-and-the-argument-from-contingency

URL: https://www.apologeticspress.org/APContent.aspx?category=9&article=4786

URL: https://www.reasonablefaith.org/writings/scholarly-writings/divine-eternity/a-critique-of-grudems-formulation-and-defense-of-the-doctrine-of-divine-ete/

URL: https://www.reasonablefaith.org/question-answer/P320/reservations-about-the-ontological-argument

URL: https://www.reasonablefaith.org/question-answer/P70/reservations-about-the-ontological-argument