Homocysteine, Folate, and Vitamins B₆ and B₁₂ Blood Levels in Relation to Cognitive Performance: The Maine-Syracuse Study, Merrill F. Elias, Michael A. Robbins, Marc M. Budge, Penelope K. Elias, Suzanne L. Brennan, Carole Johnston, Zsuzsanna Nagy, Christopher J. Bates
Maine-Syracuse Longitudinal Papers

Serum Cholesterol and Cognitive Performance in the Framingham Heart Study, Penelope K. Elias, Merrill F. Elias, Ralph B. D'Agostino, Lisa M. Sullivan, Philip A. Wolf
Maine-Syracuse Longitudinal Papers