La memoria sociale. Mezzi per comunicare e modi di dimenticare, Laterza, Roma-Bari, 2001 (extended German translation Soziales Vergessen. Formen und Medien des Gedächtnisses der Gesellschaft. Frankfurt a.M.: Suhrkamp 2002.) Luhmann In Glossario (with Claudio Baraldi and Giancarlo Corsi). Milano: Angeli, 1995 (Japanese translation Tokio: Kokubun-sha, 2013; German translation GLU. Glossar zu Niklas Luhmanns Theorie sozialer Systeme. Suhrkamp, Frankfurt a.M.,1997; Spanish translation GLU. Glosario sobre la teorìa social de Niklas Luhmann. Città del Messico-Gaudalajara-Barcellona: Universidad Iberoamericana, 1996; Korean and English translations forthcoming.) L’operazione di osservazione, Milano: Angeli, 1992. Articles (selection) Critique without crisis: Systems theory as a critical sociology. Thesis Eleven 2017, 143(1): 18–27. https://doi.org/10.1177/0725513617740966 Organizing without Understanding? Lists in Ancient and in Digital Cultures. Zeitschrift fur Literaturwissenschaft und Linguistik, 2017. https://doi.org/10.1007/s41244-017-0064-4. Artificial Communication? The Production of Contingency by Algorithms. Zeitschrift für Soziologie 2017, 46(4): 249–265. DOI: https://doi.org/10.1515/zfsoz-2017-1014 An ecology of differences: Communication, the Web, and the question of borders. Pp. 283–301 in Erich Hörl and James Burton (Eds.), General Ecology. The New Ecological Paradigm. London/New York: Bloomsbury, 2017. Algorithmic memory and the right to be forgotten on the web. Big Data & Society, January–June 2017. DOI: 10.1177/2053951717703996. The fascination of contingency: Fashion and modern society. Pp. 175–190 in Giovanni Matteucci and Stefano Marino (Eds.), Philosophical perspectives on fashion. London/New York: Bloomsbury, 2017. Tools to Remember an Ever-changing Past. Pp. 335–344 in Alberto Cevolini (Ed.), Forgetting Machines: Knowledge Management Evolution in Early Modern Europe. Leiden/Boston: Brill, 2016. ルーマン後の社会システム論と現代社会学(Ruman go no shakaishisutemuron to gendai shakaigaku). 現代思想, 2014(42–16): 75–85. Algorithmische Kontingenz. Der Umgang mit Unsicherheit im Web. pp. 233–249 in Alberto Cevolini, ed. Die Ordnung des Kontingenten. Beiträge zur zahlenmäßigen Selbstbeschreibung der modernen Gesellschaft. Wiesbaden: Springer VS, 2014. Economic Circularities and Second-Order Observation: The Reality of Ratings. Sociologica, 2/2013. doi: 10.2383/74851. Зацикленность экономики и наблюдения второго порядка: реальность рейтингов. Russian translation Экономическая социология. Т. 14. № 4. Сентябрь 2013(14): 58–74. The structures of uncertainty. Performativity and unpredictability in economic operations. Economy & Society, 2013(42): 102–129. Other texts (selection) Die Frivolität des Engagements und das Dilemma der ethnischen und frommen Mode. Frankfurter Allgemeine Quarterly, 2017 (3): 82–85. Realität der Zukunft und künftige Realität. Pp. 29–35 in Susanne Witzgall and Kerstin Stakemeier (Eds.), Die Gegenwart der Zukunft. Zürich-Berlin: Diaphanes, 2016. “Pläne helfen nicht, die geplante Zukunft zu realisieren”. Im Gespräch mit Elena Esposito und Nora Schultz. pp. 36–44 in Susanne Witzgall and Kerstin Stakemeier (Eds.), Die Gegenwart der Zukunft. Zürich-Berlin: Diaphanes, 2016. Die Konstruktion der