1. Romantic love and marriage. A study of age homogamy in 19th century Leuven. (abstract | pdf)
  2. “Women and the age gap between spouses: An accepted domination?” Population. Bozon. 1991. (jstor [login to read])
  3. “Role of Environmental Factors in the Timing of Puberty” Pediactrics. Euling et al. 2008. (article)
  4. “The May-December relationship since 1850: Age homogamy in the U.S.” Population Association of America Annual Convention, New Orleans. Rolf and Ferrie. 2008.(pdf)
  5. “Historical Trends in the Age at Menarche and Menopause.” Psychological Reports. Diers. 2016. (article [paywall])