Sudakov, S. N. 1993. “Estimates of the Solutions to the Equations of Motion for Viscous Fluid in a Moving Cavity With a Porous Damper”.
Ukrains’kyi Matematychnyi Zhurnal
45 (7): 1039–1044.
https://umj.imath.kiev.ua/index.php/umj/article/view/5897
.