@article {41947,
	title = {Dynamics of local expansion by an introduced species : Pterostichus melanarius III. (Coleoptera, Carabidae) In Alberta, Canada},
	volume = {5},
	year = {1999},
	pages = {121-127},
	publisher = {Diversity and  Distributions},
	url = {http://www.tiedekirjasto.helsinki.fi:8080/bitstream/1975/313/2/1999-Dynamics_of_local_expansion.pdf},
	author = {Niemela, J. and Spence, J. R.}
}
