@book{ Solr-acta55689, title = {Permanence in N species nonautonomous competitive reaction-diffusion advection system of Kolmogorov type in heterogeneous environment}, series = {Electronic journal of qualitative theory of differential equations}, author = {Balbus Joanna}, year = {2018}, url = {http://acta.bibl.u-szeged.hu/55689/1/ejqtde_2018_019.pdf} }