% pubman genre = article @article{item_1555980, title = {{German children{\textquotesingle}s productivity with tense morphology: The Perfekt (present perfect)}}, author = {Wittek, Angelika and Tomasello, Michael}, language = {eng}, doi = {10.1017/S0305000902005147}, year = {2002}, date = {2002-08}, journal = {{Journal of Child Language}}, volume = {29}, number = {3}, pages = {567--589}, }