Nagata, Munenobu; Murata, Yoshihiro; Shibata, Naoki; Yasumoto, Keiichi; Ito, Minoru
(Springer, 2006)
Group sightseeing has some advantages in terms of required budget and so on. Some travel agents provide package tours of group sightseeing, but participants have to follow a predetermined schedule in tour, and thus there ...