| Avaa | Oliva, Ota
| On the Systematics of the European Grayling, Thymallu thymallus (Linneaus, 1758) (Ostteichthyes: Thymallidae) | | artikkeli | harjus - harri | Department of Systematic Zoology, Charles University, Prague | Prague | 1974 | 8 | | | | I-kalantutkimus, harjus (avokotelo 3) |