1. Arter, T.R. and Williams, I.P., April Lyrids, Mon. Notic. Roy. Astron. Soc., 1995, vol. 277, pp. 1087–1096.
2. Babadzhanov, P.B., Fragmentation and Densities of Meteoroids, Astron. Astrophys., 2002, vol. 384, pp. 317–321.
3. Bel’kovich, O.I., Ishmukhametova, M.G., and Suleymanov, N.I., Comparative Analysis of Meteor Shower Observations Processed by Three Different Methods, Proc. Int. Conf. “Meteoroids 2001”, Kiruna, 2001, pp. 91–93.
4. Bel’kovich, O.I., Ishmukhametova, M.G., and Suleimanov, N.I., Present-Day Methods of Processing of Visual Observations of Meteor Streams and Their Potentialities, Astron. Vestn., 2001, vol. 35, no. 5, pp. 440–448 [Solar Syst. Res. (Engl. Transl.), 2001, vol. 35, no. 5, p. 400].
5. Bel’kovich, O.I. and Ishmukhametova, M.G., Mass Distribution of Lyrid Meteoroids, Astron. Vestn., 2010, vol. 44, no. 4, pp. 345–351 [Solar Syst. Res. (Engl. Transl.), 2010, vol. 44, no. 4, p. 320].