Heaney, R P; Recker, R R (1986) Distribution of calcium absorption in middle-aged women. Am J Clin Nutr 43:299-305 |
Heaney, R P; Recker, R R (1985) Estimation of true calcium absorption. Ann Intern Med 103:516-21 |
Recker, R R (1985) Calcium absorption and achlorhydria. N Engl J Med 313:70-3 |