@base . a ; . a , ; "Journal of the Faculty of Science, Imperial University of Tokyo, Section 1. Mathematics, astronomy, physics, chemistry" . a . a , , ; , , ; ; ; "0371-7720" ; ; "0371-7720" ; ; "0371-7720" ; "Journal of the Faculty of Science, Imperial University of Tokyo, Section 1. Mathematics, astronomy, physics, chemistry" ; . "Japan" . . a ; "0371-7720" ; . a ; ; "20040609171100.0"^^ ; ; . a ; "0371-7720" ; .