Εφαπτομενική γωνία (Greek Wikipedia)

Analysis of information sources in references of the Wikipedia article "Εφαπτομενική γωνία" in Greek language version.

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6,052^nd place

books.google.com

For example: Whewell, W. (1849). «Of the Intrinsic Equation of a Curve, and Its Application». Cambridge Philosophical Transactions 8: 659–671. https://books.google.com/books?id=2vsIAAAAIAAJ&pg=PA659. This paper uses $φ$ to mean the angle between the tangent and tangent at the origin. This is the paper introducing the Whewell equation, an application of the tangential angle.
Williamson, Benjamin (1899). «Angle between Tangent and Radius Vector». An Elementary Treatise on the Differential Calculus (9th έκδοση). σελ. 222.