[1]
B. ÁGAI, G. HORNYÁK, L. LÁNG, K. LEMPERT, and P. SOHÁR, “PYRIMIDINES AND CONDENSED DERIVATIVES, I. UV AND IR SPECTRA OF ISOCYTOSINES AND RELATED IMIDAZO[1,2-a]-PYRIMIDINONES”, Period. Polytech. Chem. Eng., vol. 15, no. 1-2, pp. 43–64, Jan. 1971.