Vallée C, Lerintiu C, Fortuné D, Atchonouglo K, Ban M. Representing a non-associated constitutive law by a bipotential issued from a Fitzpatrick sequence. Arch. Mech. 2009;61(3-4):325-340. Accessed December 13, 2025. https://am.ippt.pan.pl/index.php/am/article/view/v61p325