@misc{bernard_how_to_1991, 
author={Bernard, R. S.,Kapitza, H.},
title={How to discretize the pressure gradient for curvilinear MAC grids},
year={1991},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Bernard, R.; Kapitza, H.: How to discretize the pressure gradient for curvilinear MAC grids. Journal of Computational Physics. 1991. vol. 99, 288-298.}}