URL: https://www.reasonablefaith.org/writings/scholarly-writings/the-existence-of-god/the-caused-beginning-of-the-universe-a-response-to-quentin-smith/

URL: https://www.reasonablefaith.org/question-answer/P520

URL: https://www.apologeticspress.org/APContent.aspx?category=7&article=1901

URL: https://www.apologeticspress.org/APContent.aspx?category=9&article=2299

URL: https://www.apologeticspress.org/APContent.aspx?category=12&article=5492