@book{1997-graham ,title={{The mathematics of Paul Erd\H os. I}} ,booktitle={{The mathematics of Paul Erd\H os. I}} ,editor={Ronald L. Graham and Jaroslav Ne\v set\v ril} ,ISBN={3--540--61032--4} ,MR={97f:00032} ,publisher={Springer-Verlag} ,address={Berlin} ,series={Algorithms and Combinatorics} ,volume={13} ,year={1997} }