Franz Halberg, Germaine Cornélissen, George Katinas, Elena V Syutkina, Robert B Sothern, Rina Zaslavskaya, Francine Halberg, Yoshihiko Watanabe, Othild Schwartzkopff, Kuniaki Otsuka, Roberto Tarquini, Perfetto Frederico, Jarmila Siggelova
J Circadian Rhythms. 2003; 1: 2. Published online 2003 Oct 29. doi: 10.1186/1740-3391-1-2