Pryer, JA; Cook, A; Shetty, P; (2001) Identification of groups who report similar patterns of diet among a representative national sample of British adults aged 65 years of age or more. Public health nutrition, 4 (3). pp. 787-95. ISSN 1368-9800 https://researchonline.lshtm.ac.uk/id/eprint/17056