Tuula Pulska, Kimmo Pahkala, Pekka Laippala, Sirkka-Liisa Kivelä
Pulska T, Pahkala K, Laippala P, Kivelä S.
Follow up study of longstanding depression as predictor of mortality in elderly people living in the community
BMJ 1999; 318 :432
doi:10.1136/bmj.318.7181.432