The factual accuracy of this description or the file name is disputed.
Reason: Please see the relevant discussion on the talk page.
Summary
English: Serb lands in the late 9th and 10th century according to some Serbian sources, but internationally not recognized, and not based on primary sources in which there's no mention of any expansion during Časlav in the early and mid-10th century during whom could only happen enlargement of the Serbian borders. Rascia and possibly Bosnia (with disputable border with Croatia) were not part of Serbia at the time.
This work has been released into the public domain by its author, PANONIAN. This applies worldwide.
In some countries this may not be legally possible; if so: PANONIAN grants anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.
This map has been uploaded by Electionworld from en.wikipedia.org to enable the Wikimedia Atlas of the World. Original uploader to en.wikipedia.org was PANONIAN, known as PANONIAN at en.wikipedia.org. Electionworld is not the creator of this map. Licensing information is below.
References
Istorijski atlas, Geokarta, Beograd, 1999.
Miloš Blagojević, Srpska državnost u srednjem veku, Beograd, 2011.
Vladimir Ćorović, Ilustrovana istorija Srba, knjiga prva, Beograd, 2005.
Petrit Imami, Srbi i Albanci kroz vekove, Beograd, 2000.
Školski istorijski atlas, Zavod za izdavanje udžbenika SR Srbije, Beograd, 1970.
The Times, Atlas Svjetske Povijesti, Cankarjeva založba, Ljubljana - Zagreb, 1986.
Sima M. Ćirković, Srbi među evropskim narodima, Beograd, 2004.
Sve srpske mape - od šestog veka do Pariza, Specijalno izdanje BLICA, Decembar 1995. godine.
The original image seems to had been saved as JPEG, and the previous uploader had simply converted it to PNG. I have greatly reduced image size by removing JPEG artifacts, reducing color domain, etc.