How Hirundo came to be
Three decades of the journal Hirundo in numbers
Väli, Ü. & Nellis, R.
Roles of Hirundo in activities of Estonian Ornithological Society
Marja, R. & Elts, J.
Habitat usage and activity patterns of the Eurasian collared dove based on collected data in the year 2017
Marja, R., Kuus, A. & Kalamees, A.
Characteristics of open-sea birds and their relationships with seasonality, sea depth and longitude in the Gulf of Finland