“…Some of the authors concentrated on these comets, in particular on the target of the Rosetta mission, 46P/Wirtanen: Kossacki et al (1999); Moehlmann (1999); Capria et al (2001). A group of authors concentrated on the theoretical study of surface properties: Hughes (2000); Skorov and Rickman (1999a); Skorov et al (1999b); Skorov et al (2002); Davidsson and Skorov (2002). The effects of the irregular shape of nuclei were studied by Gutierrez et al (2000); Gutierrez et al (2001).…”