Kizner, Z.; Khvoles, R. (2004). "Two variations on the theme of Lamb–Chaplygin: supersmooth dipole and rotating multipoles". Regular and Chaotic Dynamics. 9 (4): 509. doi:10.1070/rd2004v009n04abeh000293. ISSN1560-3547.
Kizner, Z.; Khvoles, R. (2004). "Two variations on the theme of Lamb–Chaplygin: supersmooth dipole and rotating multipoles". Regular and Chaotic Dynamics. 9 (4): 509. doi:10.1070/rd2004v009n04abeh000293. ISSN1560-3547.