id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ap-1948	Stanev, Todor	ULTRAHIGH ENERGY COSMIC RAYS: REVIEW OF THE CURRENT SITUATION	2013	5	.pdf	application/pdf	3594	193	68	Keywords: high energy cosmic rays, hadronic interaction at very high energy, origin of the highest energy cosmic rays. At relatively low energy, the widths of the distribu- tions were more similar to proton showers, while at high energy the statistics is not enough to judge the distributions. 2.3.	cache/ap-1948.pdf	txt/ap-1948.txt