Pittaway, J. K., Ahuja, K. D. K., Beckett, J. M., Bird, M., Robertson, I. K., & Ball, M. J. (2013). Make Vitamin D While the Sun Shines, Take Supplements When It Doesn′t: A Longitudinal, Observational Study of Older Adults in Tasmania, Australia. Public Library of Science.

Pittaway, Jane K., Kiran D. K. Ahuja, Jeffrey M. Beckett, Marie-Louise Bird, Iain K. Robertson, und Madeleine J. Ball. Make Vitamin D While the Sun Shines, Take Supplements When It Doesn′t: A Longitudinal, Observational Study of Older Adults in Tasmania, Australia. Public Library of Science, 2013.

Pittaway, Jane K., et al. Make Vitamin D While the Sun Shines, Take Supplements When It Doesn′t: A Longitudinal, Observational Study of Older Adults in Tasmania, Australia. Public Library of Science, 2013.