S. L. B. König, D. Kowerko, and R. K. O. Sigel, “Kinetic Subpopulations Detected by Single-molecule Spectroscopy: Fundamental Property of Functional Nucleic Acids or Experimental Artefact?”, Chimia, vol. 67, no. 4, p. 240, Apr. 2013, doi: 10.2533/chimia.2013.240.