DiaboloDiabolo
a brief introduction to the diabolo
some notes on diabolo strings
2-diabolo toss-in techniques
Dr. Brendan Brolly's Scientific Guide to the Diabolo,
for 1 and 2 diabolos, with illustrations
A Diabolo Home Page,
by Elia Berteletti
How to use a diabolo,
from the good folks at Infinite Illusions