Luka Burazin, The Concept of Law and Efficacy, in: Encyclopedia of the Philosophy of Law and Social Philosophy, Springer, 2017. Available at: <https://www.academia.edu/33643776/The_Concept_of_Law_and_Efficacy>. Croatian version available at: <file:///C:/Users/User/Downloads/pravni_vjesnik_vol_33_3_4_burazin%20(1).pdf>.