@incollection{Gagarina2013,
  author    = {Natalia Vladimirovna Gagarina},
  title     = {The acquisition of aspectuality by Russian children : the early stages},
  booktitle = {Papers on language change and language acquisition, Zentrum f{\"u}r Allgemeine Sprachwissenschaft, Sprachtypologie und Universalienforschung, Berlin, 2000; ZAS papers in linguistics Vol. 15},
  volume    = {15},
  url       = {http://www.zas.gwz-berlin.de/211.html},
  year      = {2013},
}