Ana Adan et al., “Circadian Typology: A Comprehensive Review,” Chronobiology International 29, no. 9 (2012): 1153–1175. See also Ryan J. Walker et al., “Age, the Big Five, and Time-of-Day Preference: A Mediational Model,” Personality and Individual Differences 56 (2014): 170–174; Christoph Randler, “Proactive People Are Morning People,” Journal of Applied Social Psychology 39, no. 12 (2009): 2787–2797; Hervé Caci, Philippe Robert, and Patrice Boyer, “Novelty Seekers and Impulsive Subjects Are Low in Morningness,” European Psychiatry 19, no. 2 (2004): 79–84; Maciej Stolarski, Maria Ledzińska, and Gerald Matthews, “Morning Is Tomorrow, Evening Is Today: Relationships Between Chronotype and Time Perspective,” Biological Rhythm Research 44, no. 2 (2013): 181–196.