Xiaodong Gu Guoliang Chen Yinlong Xu Average-Case Performance Analysis of a 2D Strip Packing Algorithm-NFDH. 19-34 2005 9 J. Comb. Optim. 1 http://dx.doi.org/10.1007/s10878-005-5481-6 db/journals/jco/jco9.html#GuCX05