Katsushi Morimoto Hirokazu Iriguchi Jun-Ichi Aoe A Method of Compressing Trie Structures. 265-288 1994 24 Softw., Pract. Exper. 3 db/journals/spe/spe24.html#MorimotoIA94 http://dx.doi.org/10.1002/spe.4380240303