Gaya APA

[et.al.], M, B. (2012). A variational formulation for constitutive laws described by bipotentials (18(1)). : SAGE Publications Ltd.

Gaya MLA

[et.al.], Marius, Buliga. "A variational formulation for constitutive laws described by bipotentials". 18(1) : SAGE Publications Ltd, 2012. e-journal.