1. History and science of knots, in: Series on Knots and Everything, World Scientific, 1996, p. 464.
2. The knot in hebrew literature, or from the knot to the alphabet;Gandz;Isis,1930
3. J.L. Locher, The world of MC Escher, Abrams New York, 1971.
4. Chapter 5 - The enumeration and classification of knots and links;Hoste,2005
5. Knotting matters: orderly molecular entanglements;Ashbridge;Chem. Soc. Rev.,2022