Publikacje z roku 2021

  1. Where are the Polish Sunday babies? : declining weekend births in the years 1967-2017 / Jacek Cypryjański, Marta Hozer-Koćmiel, Leszek Gracz. // European Research Studies Journal. 2021, vol. 24 special issue 4, s.881-892 DOI: 10.35808/ersj/2813 (WorkId 29240)
  2. Can Polish voivodeships cities use mobile apps? / Leszek Gracz. - // W: Innovation management and sustainable economic development in the era of global pandemic : proceedings of the 38th International Business Information Management Association Conference (IBIMA), 23-24 November 2021, Seville, Spain - King of Prussia : International Business Information Management Association, 2021 (WorkId 29310)
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