1. Bakke , P. and Leach , S. J. , 1960 , Methane Roof Layers , Safety in Mines Research Establishment Report 195 .
2. Bird , Byron R. , Stewart , Warren E. , Lightfoot , Edwin N. , 1965 ,Transport Phenomena, John Wiley & Sons Inc. , New York , N.Y. , p. 188 .
3. Leach , S. J. and Barbero , L. P. , 1961 , Experiments on Methane Roof Layers . Multiple Sources, Safety in Mines Research Establishment Research Report 205 .
4. Martin , F. J. , 1958 , Transition From Slow Burning to Detonation in Gaseous Explosives , General Electric Research Laboratory Report No. 58-RL-1936 .