@article{weko_60049_1, author = "Yasuyuki,Nishikawa and Yuuji,Yoshida and Teruo,Fukumura", title = "Top-down Algorithms for Constructing Nearly Optimal Binary Search Trees", journal = "Information Processing in Japan", year = "1977", volume = "17", number = "0", pages = "32--36", month = "jan" }