Has gambling changed after major amendments of gambling regulations in Germany? : a propensity score analysis  / Monika Ludwig [et al.]
  Bibliogr.: p. 160-161. - Abstr. eng.
  In: Journal of Behavioral Addictions. - ISSN 2062-5871, eISSN 2063-5303. - 2012. 1. évf. 4. sz., p. 151-161. : ill.