Väisänen, R., Somerma, P., Kuussaari, M. and Nieminen, M. 1991. <i>Bryodema tuberculata</i> and <i>Psophus stridulus</i> in southwestern Finland (Saltatoria, Acrididae). Entomologica Fennica. 2, 1 (Jan. 1991), 27–32. DOI:https://doi.org/10.33338/ef.83505.