@book {4,
	title = {Suomen kukkak{\"a}rp{\"a}set ja l{\"a}hialueiden lajeja (Finnish hoverflies and some species in adjacent countries)},
	year = {2007},
	pages = { 647},
	publisher = {Otava (\& Suomen ymp{\"a}rist{\"o}ministeri{\"o})},
	organization = {Otava (\& Suomen ymp{\"a}rist{\"o}ministeri{\"o})},
	address = {Keuruu},
	author = {Haarto, Antti and Kerppola, Sakari}
}
