TY - JOUR L1 - http://journals.pan.pl/Content/85682/PDF/10172%20Volume%2056%20Issue%202-31%20paper%20PDF.pdf L2 - http://journals.pan.pl/Content/85682 PY - 2011 IS - No 2 June DO - 10.2478/v10172-011-0054-4 A1 - Pęcherski, R. A1 - Nowak, M. A1 - Szeptyński, P. PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences DA - 2011 T1 - An Extension of Burzyński Hypothesis of Material Effort Accounting for the Third Invariant of Stress Tensor UR - http://journals.pan.pl/dlibra/publication/edition/85682 T2 - Archives of Metallurgy and Materials ER -