Analysis of information sources in references of the Wikipedia article "Vjosa" in English language version.
The late Roman province of Epirus Vetus covered an area that roughly approximates to the Epirus of classical antiquity, a region now divided between the modern states of Greece and Albania (Fig. 1.1). It stretched from the Akrokeraunian mountains (south of the Gulf of Aulon) in the north, to the mouth of the Acheloos river in the south and included the islands of Kerkyra, Leukas and Ithaca. The principal geographical features of Epirus Vetus are the... [...] The five main rivers of Epirus Vetus (the Aoos, the Kalamas, the Acheron, the Arachthos and the Acheloos), together with their various tributaries, have carved their way between the mountain ranges, their valleys and gorges forming both aids and barriers to communication. It seems probable that from its source until a point around Tepelenë, the Aoos may have defined the boundary of Epirus Vetus, before passing into Epirus Nova.
