Fluid transport in a tube of variable cross-sectional area by peristaltic waves of dilating amplitude: A mathematical model for investigating impact of hiatus hernia on swallowing Fluid transport in a tube of variable cross-section. (2022). Journal of International Academy of Physical Sciences, 26(1), 1-16. http://www.iaps.org.in/journal/index.php/journaliaps/article/view/930