Journal article (1998) - J Zhao (author) , R Abegg (author) , DC Healey (author) , L Lee (author) , E Korkmaz (author) , N Kolb (author) , CDP Levy (author) , J Li (author) , CA Miller (author) , SA Page (author) , R Helmer (author) , AK Opper (author) , AR Berdoz (author) , H Postma (author) , WD Ramsay (author) , J Soukop (author) , GM Stinson (author) , WTH van Oers (author) , AN Zelenski (author) , J Birchall (author) , JR Campbell (author) , CA Davis (author) , PPJ Delheij (author) , L Gan (author) , LG Green (author) , LG Greeniaus (author)