Hirvenoja, M., Palmén, E. and 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 (Jun. 2006), 87–89. DOI:https://doi.org/10.33338/ef.84292.