SOHN, Y. Four pillars of Luhmann’s analytical apparatus: Applications for communication research. Studies in Communication Sciences, [S. l.], p. 1–18, 2021. DOI: 10.24434/j.scoms.2021.02.002. Disponível em: https://www.hope.uzh.ch/scoms/article/view/2450. Acesso em: 3 dec. 2021.