Didžgalvis , Rimantas, and Antanas Sudintas. “Dynamical Investigation of a Supported Pipe Line Section With Flowing Liquid When Intermidiate Support Is Removed”. Lietuvos Matematikos Rinkinys, vol. 38, no. II, Dec. 1998, pp. 423–425 , https://doi.org/10.15388/LMD.1998.37948.