“…Just to name the most important, we can refer the reader to Matkowski, Prochniak (2004, Prochniak (2006), Arbia et al (2008), Young et al (2008), Rapacki, Prochniak (2009), Vojinovic et al (2010), Szeles (2011), Oplotnik et al (2011), or Libman, Vinokurov (2012.…”