LOLOV, Dimitar, and Svetlana LILKOVA-MARKOVA. “Generalized Differential Quadrature Method for Studying the Out off Plane Vibrations of Curved Pipes Conveying Fluid”. Romanian Journal of Acoustics and Vibration 18, no. 1 (July 22, 2021): 36-39. Accessed September 20, 2021. http://rjav.sra.ro/index.php/rjav/article/view/198.