Tight Upper and Lower Bounds on the Path Length of Binary Trees.

Alfredo De Santis Giuseppe Persiano Tight Upper and Lower Bounds on the Path Length of Binary Trees. 12-23 1994 23 SIAM J. Comput. 1 db/journals/siamcomp/siamcomp23.html#SantisP94 http://dx.doi.org/10.1137/S0097539791197323