S. G. Tzafestas: Introduction to Mobile Robot Control. Elsevier, 2013, ISBN 978-0-12-417103-9 (google.de [abgerufen am 19. September 2021]): „For this reason it is also known as Ilon wheel or Swedish wheel.“
Wheels for a course stable selfpropelling vehicle movable in any desired direction on the ground or some other base. 13. November 1972 (google.com [abgerufen am 19. September 2021]).