Analysis of information sources in references of the Wikipedia article "روسینیا" in Persian language version.
Rvcia hatte Rutenia and is a prouynce of Messia (J. Trevisa, 1398).
From the linguistic standpoint, the results of this catastrophe [the Mongol invasion] somewhat resemble the collapse of the Roman empire for the latin-speaking peoples. Like the great 'Romania' of the Western Middle Ages, there was a great 'Ruthenia' in which common linguistic origin and some measure of mutual comprehensibility was assumed.