K. Choi and H. J. Suk, “Dynamic Lighting System for the Learning Environment: Performance of Elementary Students,” Optics Express 24, no. 10 (May 16, 2016): A907–A916, doi: 10.1364/OE.24.00A907; H. Slama et al., “Afternoon Nap and Bright Light Exposure Improve Cognitive Flexibility Post Lunch,” PLOS ONE 10, no. 5 (May 27, 2015):e0125359, doi: 10.1371/journal.pone.0125359.
