Manuel Comneno Ducas (Spanish Wikipedia)

Analysis of information sources in references of the Wikipedia article "Manuel Comneno Ducas" in Spanish language version.

refsWebsite

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books.google.com

Demetrios I. Polemis (1968). The Doukai: a contribution to Byzantine prosopography. Athlone P. p. 90. ISBN 9780485131222. «1216, through the efforts of Theodoros 42, Manuel married a Serbian princess who was a sister of king Stephen II Nemanja.7 She could not have lived long as in 1225 Manuel married again, this time with Maria, an illegitimate daughter of Ivan ...»
François Bredenkamp (1996). The Byzantine Empire of Thessaloniki, 1224-1242. Municipality of Thessaloniki, Thessaloniki History Center. p. 148. ISBN 9789608433175.