@article {34249,
	title = {Life cycle and larval instars of the Holarctic Agabus opacus Aub{\'e} (Coleoptera : Dytiscidae)},
	volume = {15},
	year = {1984},
	pages = {492-496},
	publisher = {Insect Systematics \& Evolution},
	author = {Nilsson, Andhrs N.}
}
