Koukopoulos، A (يناير 2003). "Ewald Hecker's description of cyclothymia as a cyclical mood disorder: its relevance to the modern concept of bipolar II". Journal of Affective Disorders. ج. 73 ع. 1–2: 199–205. DOI:10.1016/S0165-0327(02)00326-9. PMID:12507752.
Perugi، G؛ Hantouche، E؛ Vannucchi، G؛ Pinto، O (1 سبتمبر 2015). "Cyclothymia reloaded: A reappraisal of the most misconceived affective disorder". Journal of Affective Disorders. ج. 183: 119–33. DOI:10.1016/j.jad.2015.05.004. PMID:26005206.
Commentary on Hecker and his work: Baethge، C؛ Salvatore، P؛ Baldessarini، RJ (سبتمبر 2003). "Cyclothymia, a circular mood disorder". History of Psychiatry. ج. 14 ع. 55 Pt 3: 377–390. DOI:10.1177/0957154X030143008. PMID:14621693. New translation of Hecker's 1898 paper: Hecker، Ewald؛ Salvatore، P؛ Baldessarini، R. J. (سبتمبر 2003). "Classic Text No 55: Cyclothymia, a Circular Mood Disorder by Hecker, 1898". History of Psychiatry. ج. 14 ع. 55 Pt 3: 391–399. DOI:10.1177/0957154X030143008. PMID:14621693.
Koukopoulos، A (يناير 2003). "Ewald Hecker's description of cyclothymia as a cyclical mood disorder: its relevance to the modern concept of bipolar II". Journal of Affective Disorders. ج. 73 ع. 1–2: 199–205. DOI:10.1016/S0165-0327(02)00326-9. PMID:12507752.
Perugi، G؛ Hantouche، E؛ Vannucchi، G؛ Pinto، O (1 سبتمبر 2015). "Cyclothymia reloaded: A reappraisal of the most misconceived affective disorder". Journal of Affective Disorders. ج. 183: 119–33. DOI:10.1016/j.jad.2015.05.004. PMID:26005206.
Commentary on Hecker and his work: Baethge، C؛ Salvatore، P؛ Baldessarini، RJ (سبتمبر 2003). "Cyclothymia, a circular mood disorder". History of Psychiatry. ج. 14 ع. 55 Pt 3: 377–390. DOI:10.1177/0957154X030143008. PMID:14621693. New translation of Hecker's 1898 paper: Hecker، Ewald؛ Salvatore، P؛ Baldessarini، R. J. (سبتمبر 2003). "Classic Text No 55: Cyclothymia, a Circular Mood Disorder by Hecker, 1898". History of Psychiatry. ج. 14 ع. 55 Pt 3: 391–399. DOI:10.1177/0957154X030143008. PMID:14621693.