| Auteur(s) | Demyanova, E.I., Kvitkina, A.K. and Lykov, V.A. |
| Jaar | 2007 |
| Titel | The feature of pollination of Heracleum sibiricum L. and Seseli libanotis (L.) Koch (Apiaceae) at conditions of West Ural . Bulletin of the Perm University. Series: "Biology" 5(10): 6-14. |