[Depression--which is first? The egg or the chicken?]. Rossen K. Ugeskr Laeger. 1997 Sep 29;159(40):5958. PMID: 9381573
The atypical depressive illnesses. Tourney G, Beckett PG, Gottlieb JS. J Iowa Med Soc. 1965 May;55(5):253-9. PMID: 5836233
[The practicing physician and depression. A general view. Introduction. Importance and occurrence of depressive states]. Kielholz P. Rev Med Suisse Romande. 1978 Sep;98(9):459-60. PMID: 705158
[Anxiety and depression in cancer patients]. Tjemsland L. Tidsskr Nor Laegeforen. 1998 Feb 20;118(5):685. PMID: 9528361