Tkaczyk P., Bednarek W., Dresler S., Krzyszczak J., Baranowski P.:  Relation of mineral nitrogen and sulphate sulphur content in soil to certain soil properties and applied cultivation treatments (2017 r.) Acta Agrophysica 2017, Vol. 24, 3, 523-534

Tkaczyk P., Bednarek W., Dresler S., Krzyszczak J., Baranowski P., Sławiński C.:  Relationship between assimilable-nutrient content and physicochemical properties of topsoil (2017 r.) International Agrophysics 2017, Vol. 31, 4, 551-562

Tkaczyk P., Bednarek W., Dresler S., Krzyszczak J.:  Evaluation of soil reaction and content of assimilable nutrients in soils of South-Eastern Poland. (2016 r.) Acta Agrophysica 2016, Vol. 23, 2, 249-260

Tkaczyk P., Bednarek W., Dresler S., Krzyszczak J.:  Evaluation of nutrients supply in apple trees cultivated in Lubelskie Region. / Ocena zaopatrzenia w makro-i mikroelementy jabłoni uprawianych na Lubelszczyźnie. (2014 r.) Acta Agrophysica 2014, Vol. 21, 4, 507-515