“Consideration of Reaction Forces of Holonomic Constraints as Generalized Coordinates in Approximate Determination of Lower Frequencies of Elastic Systems”, TechMech, vol. 28, no. 2, pp. 126–139, Jul. 2019, Accessed: Oct. 27, 2026. Available: https://journals.ub.ovgu.de/ojs/techmech/article/view/833