@article {74677,
	title = {Effects of CoCl2, NiCl2 and FeCl3 additives on biogas and methane production},
	journal = {Misr Journal of Agricultural Engineering},
	volume = {32},
	year = {2015},
	pages = {843-862},
	author = {E. Abdelsalam and M. Samer and Abdel-Hadi, MA and H. E. Hassan and Y. Badr}
}
