@article {guo1997guangfu,
	title = {Guangfu, Cao, 491},
	journal = {Journal of Mathematical Analysis and Applications},
	volume = {216},
	year = {1997},
	note = {n/a},
	pages = {696{\textendash}697},
	abstract = {n/a},
	author = {Guo, Dajun and Bajo, Ignacio and Boyarsky, Abraham and Cakar, {\"O}ner and Celebi, A Okay and Chang, Shih-sen and Changyong, Zhong and Christofides, Panagiotis D and Cohn, William S and Daoutidis, Prodromos and others}
}
