V. Skvortsov, N. Alekseychuk, Y. Miroshnichenko, and A. Rybina, “ The Prediction of the Ion Fraction of the Peptide with Selected Charge in Mass Spectrometry with Positive Electrospray Ionization”, BIOMED CHEM RM, vol. 2, no. 4, p. e00100, Dec. 2019.