Jeffrey C. Lagarias, Colin L. Mallows, Allan R. Wilks.Beyond the Descartes Circle Theorem // The American Mathematical Monthly. — April 2002. — Т. 109, вып. 4. — С. 338–361. — JSTOR2695498.
jstor.org
Jeffrey C. Lagarias, Colin L. Mallows, Allan R. Wilks.Beyond the Descartes Circle Theorem // The American Mathematical Monthly. — April 2002. — Т. 109, вып. 4. — С. 338–361. — JSTOR2695498.