- Reproduction in Domestic Animal. Antioxidant Defence System of Boar Cauda Epididymal Spermatozoa and Reproductive Tract Fluids. M. Koziorowska-Gilun, M. Koziorowski, L. Fraser, J. Strzeżek. 2011. 46, 527-533.
- Reproduction in Domestic Animals. Effect of freezing on sperm nuclear DNA. L. Fraser., J. Strzeżek., W. Kordan. 2011. 46 (Suppl. 2), 14-17.
- Polish Journal of Veterinary Sciences. Molecular forms of selected antioxidant enzymes in dog semen – electrophoretical identification. M. Koziorowska-Gilun, R. Strzeżek. 2011. Vol. 14, No 1, 29-33.
- Polish Journal of Veterinary Sciences . Boar viability affects sperm metabolism activity in liquid stored semen at 5oC. A. Dziekońska, J. Strzeżek. 2011. Vol. 14. No 1, 21-27.
- Reproductive Biology. Seasonal changes in antioxidant defence systems in seminal plasma and fluids of the boar reproductive tract. . M. Koziorowska-Gilun, M. Koziorowski, J. Strzeżek, L. Fraser. 2011. Vol. 11, No 1, 37-47.
- Acta Biochimica Polonica. Zinc-binding proteins from boar seminal plasma – isolation, biochemical characteristics and influence on spermatozoa stored at 4oC. Mogielnicka M., Wysocki P., Strzeżek J., Kordan W. 2011. No 2/2011, vol. 58, 171-177.
- Polish Journal of Veterinary Sciences. Characteristics of selected seminal plasma proteins and their application in the improvement of the reproductive processes in mammals. M. Mogielnicka-Brzozowska, W. Kordan. 2011. Vol 14, No 3, 489-499.
- Bulletin of the Vetreinary Institute in Pulawy. Comparative study of different methods for plasma membrane integrity assessment of frozen-thawed boar spermatozoa. Fraser L., Zasiadczyk Ł., Lecewicz M., Kordan W. 2011. 55, 231-236.
- Przegląd Hodowlany. Pierwsze knury uzyskane po inseminacji loch nasieniem kriokonserwowanym użytkowane w fermie zarodowej. J. Strzeżek, T. Opiłowski, A. Puchalski, L. Fraser., B. Wiśniewska, P. Wysocki, Ł. Zasiadczyk. 2011. 1, 16-19.
