http://prace.iod.krakow.pl/praceio/1325674035f930eaf.pdf
https://drive.google.com/open?id=1e3GHibdI2wCsWMLBZPakqcTSeEYMD2M2
https://docs.google.com/document/d/1L0iIdFi9isY71mppWoXTtjOMOw7pQwb1rvPrmyBcju8/edit#
