Figure Eight Curve - MacTutor History of Mathematics

Chronology of computation of π - Wikipedia

Envelopes and Offsets of Two Algebraic Plane Curves: Exploration of Their Similarities and Differences

Watt's Curve - MacTutor History of Mathematics

MacTutor: Biographical History of Math – Occupy Math

Watt's Curve - MacTutor History of Mathematics

The Educational Times Database: International Contributors

Curve [AE]

The Educational Times Database: Building an Online Database of Mathematics Questions and Solutions Published in a 19th-Century Journal

Envelopes and Offsets of Two Algebraic Plane Curves: Exploration of Their Similarities and Differences

KNOTS

Figure 8 Follow Through Knot: Step-By-Step Guide

A better way to tie the figure 8? — Alpine Savvy

FasTrack Figure 8 Add-On Track Pack

The Figured Eight – Path of the figured eight

Figure of 8 bandage: Purpose, Procedure, Benefits and Side Effects