Curvature effects on wave propagation in an infinite pipeRatassepp, Madis; Klauson, AleksanderUltragarsas = Ultrasound2006 / 2(59), Proceedings of the International Conference "Non-Destructive Testing and Diagnostics - 2006" : 26-27 May 2006, Vilnius, p. 19-25 : illhttps://www.ndt.net/article/ultragarsas/59-2006-vol.2_04-m.ratassepp.pdf