[1] Shapiro,H.I., Shapiro,J.P., Shapiro,L.K.: Cranes and Derrics. Third edition. . McGraw-Hill Companies, Inc., USA, 2000, ISBN 0-07-057889-3.
[2] Transport and Handling Equipment, Polák,J., Brázda,R.: VŠB - TUO 2012 (The text was created within the "InterDV" project)