Analysis of information sources in references of the Wikipedia article "کشانده" in Persian language version.
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value (help), [[۲](https://books.google.com/books?id=V7mxZqjs5yUC&pg=PA345) extract of page 345]{{cite book}}
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value (help)The GT tooth profile is based on the tractix mathematical function. Engineering handbooks describe this function as a “frictionless” system. This early development by Schiele is described as an involute form of a catenary.
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value (help)[پیوند مرده]{{cite journal}}
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value (help)[پیوند مرده]