Analysis of information sources in references of the Wikipedia article "Tsimshianic languages" in English language version.
Though Tsimshianic is unmistakably part of the central northwest coastal Sprachbund (Beck 2002), no convincing evidence has been forthcoming for a genetic relationship between it and any other language family, in spite of persistent attempts to lump the family into the hypothetical Penutian stock, whose other members are found far to the south in Oregon and California (see for example Sapir 1921 and Tarpent 1997).
