@article {221964,
	title = {A method for maximizing biogas production by using laser radiation and nanoparticles},
	year = {2020},
	publisher = {Patent office EP, Patent number 29648, Application number EG/P/2017/287},
	issn = {29648; Application number EG/P/2017/287},
	author = {M. Samer and E. M. Abdelsalam and Y. Attia}
}
