-Packs a large circle with smaller circles, demonstrating the
-Descartes Circle Theorem. Written by Allan R. Wilks and David Bagley.
+A fractal packing of circles with smaller circles, demonstrating
+Descartes's theorem.
+
+https://en.wikipedia.org/wiki/Apollonian_gasket
+https://en.wikipedia.org/wiki/Descartes%27_theorem
+
+Written by Allan R. Wilks and David Bagley; 2002.