id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cet-4969		cet-4969		6	.pdf	application/pdf	3084	141	57	Bottoms R. R., 1930, Separating acid gases, U.S. Patent 1783901 Budzianowski M.W., 2011, Benefits of biogas upgrading to biomethane by high-pressure reactive solvent scrubbing, Biofuels Bioprod. Rasi S., Veijanen A., Rintala J., 2007, Trace compounds of biogas from different biogas production plants.	cache/cet-4969.pdf	txt/cet-4969.txt