By Martha Hotz Vitaterna, David P. King, Anne-Marie Chang, Jon M. Kornhauser, Phillip L. Lowrey, J. David McDonald, William F. Dove, Lawrence H. Pinto, Fred W. Turek, Joseph S. Takahashi.
Online text: pmc.ncbi.nlm.nih.gov/articles/PMC3839659/
Online text: pmc.ncbi.nlm.nih.gov/articles/PMC6707128/
Authored review published in 2001 in Alcohol Research & Health 25(2), pp. 85–93. The actually inspected PDF copy is linked below; the publisher record is hosted by PubMed Central.
Cited passages: Vitaterna, Takahashi and Turek (2001), Overview of Circadian Rhythms, pp. 85–86, Biological Rhythms and Basic Properties of Circadian Rhythms; p. 92, glossary entries Entrainment, Free running and Masking; pp. 86–87, Figure 1A; p. 92, Free running; pp. 86–87, synchronization to external cues; p. 92, Entrainment and Zeitgeber.