Hirvenoja, M., Palmén, E., & Hirvenoja, E. (2006). The emergence of <i>Halocladius variabilis</i> (Staeger) (Diptera: Chironomidae) in the surroundings of the Tvärminne Biological Station in the northern Baltic Sea. Entomologica Fennica, 17(2), 87–89. https://doi.org/10.33338/ef.84292