Affiliation: | 1.Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100, Toruń, Poland ;2.GPCHEM. Laboratory of Biogas Research and Analysis, GPCHEM, Legionów 40a/3 Street, 87-100, Toruń, Poland ;3.Department of Statistics and Econometrics, Gdańsk University of Technology, Narutowicza 11/12 Street, 80-233, Gdańsk, Poland ;4.Faculty of History, Nicolaus Copernicus University in Toruń, Szosa Bydgoska 44-48, 87-100, Toruń, Poland ; |