- Andrey A. Dobrynin, Vladimir R. Rosenfeld, “Enumeration of Pentahexagonal Annuli in the Plane”, Mathematics, 7, № 12, 2019, 1156
- Alexandru T. Balaban, “Theoretical Examination of New Forms of Carbon Formed by Intra- or Intermolecular Dehydrogenation of Polycyclic Aromatic Hydrocarbons, Particularly Helicenes”, Polycyclic Aromatic Compounds, 23, № 3, 2003, 277