Circasemiannual chronomics: Half-yearly biospheric changes in their own right and as a circannual waveform

Germaine G Cornelissen-Guillaume, Franz Halberg, Ludwig Pöllmann, Brigitte Pöllmann, George S. Katinas, Hélène Minne, Tamara Breus, Robert B. Sothern, Yoshihiko Watanabe, Roberto Tarquini, Federico Perfetto, Cristina Maggioni, Douglas Wilson, Denis Gubin, Kuniaki Otsuka, Earl E. Bakken