Welch, John W., and Greg Welch. Life Spans of Alma's Lineage. Provo, UT: Foundation for Ancient Research and Mormon Studies, 1999.

Welch, John W., and Greg Welch. Life Spans of Lehi's Lineage. Provo, UT: Foundation for Ancient Research and Mormon Studies, 1999.

Welch, John W., and Greg Welch. Life Spans of Mosiah's Lineage. Provo, UT: Foundation for Ancient Research and Mormon Studies, 1999.

Welch, John W.. "Longevity of Book of Mormon People and the "Age of Man"." The Journal of Collegium Aesculapium 3 (1985): 34-45.

Valletta, Thomas R.. "Why did Adam and his descendants live so long?" Ensign 24, no. 2 (1994): 61-62.