@incollection{Gagarina2013,
  author    = {Natalia Vladimirovna Gagarina},
  title     = {Does the acquisition of aspect have anything to do with aspectual pairs?},
  booktitle = {Studies on the development of grammar in German, Russian and Bulgarian / Ed. by Natalia Gagarina \& Dagmar Bittner, Zentrum f{\"u}r Allgemeine Sprachwissenschaft, Sprachtypologie und Universalienforschung, Berlin, 2004; ZAS papers in linguistics Vol. 33},
  volume    = {33},
  url       = {http://www.zas.gwz-berlin.de/195.html?\&L=0\%20order\%20by\%201000\%20--},
  year      = {2013},
}