Journal article (1999) - EI Sharapov (author), JD Bowman (author), GE Mitchell (author), SI Pennttila (author), H Postma (author), NR Roberson (author), SJ Seestrom (author), SL Stephenson (author), Y-F Yen (author), VW Yuan (author), BE Crawford (author), PPJ Delheij (author), T Haseyama (author), JN Knudson (author), LY Lowie (author), A Masaike (author), Y Masuda (author), Y Matsuda (author)