Gonçalves, A. S., & Quirino, R. H. R. (2018). The Hans Kelsen fundamental hypothetical standard and the Herbert Hart recognition rule: similarities and differences between the validity criteria of the legal system. Seqüência - Legal and Political Studies, 39(78), 91–118. https://doi.org/10.5007/2177-7055.2018v39n78p91