Camelia Frigioiu and  Katica (Stevanovic) Hedrih and  Iulian Gabriel Birsan,  Lagrangian Geometrical Model of the Rheonomic Mechanical Systems.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2011, vol. 49(1). 24 - 30
    [viewed 19 April 2024]. Available from: https://publications.waset.org/pdf/2858.