@inproceedings{Karim_1989,
series={FTT},
title={Experimental and Analytical Studies of the Lean Operational Limits in Methane Fuelled Spark Ignition and Compression Ignition Engines},
ISSN={0148-7191},
url={http://dx.doi.org/10.4271/891637},
DOI={10.4271/891637},
booktitle={SAE Technical Paper Series},
publisher={SAE International},
author={Karim,
G. A. and Wierzba,
I.},
year={1989},
month=aug,
collection={FTT} }