@incollection{Nassar13,
author = {Nehal S. Ahmed and Amal M. Nassar},
title = {Lubrication and Lubricants},
booktitle = {Tribology},
publisher = {IntechOpen},
address = {Rijeka},
year = {2013},
editor = {Jürgen Gegner},
chapter = {2},
doi = {10.5772/56043},
url = {https://doi.org/10.5772/56043}
}