“Study of the Stability of the Biologically Active Compound N-[2-[4-Oxo-3(4H)-quinazolinyl]propionyl]-Guanidine Using Electrophoresis and Mass Spectrometry”. Sorbtsionnye I Khromatograficheskie Protsessy, vol. 24, no. 2, May 2024, pp. 257-6, https://doi.org/10.17308/sorpchrom.2024.24/12128.