Categories: How I Learned to Stop Worrying and Love Two Sorts. - Willem Conradie; Sabine Frittella; Alessandra Palmigiano; Michele Piazzai; Apostolos Tzimoulis; Nachoem Wijnberg (WoLLIC, 2016)

Toward an Epistemic-Logical Theory of Categorization. - Willem Conradie; Sabine Frittella; Alessandra Palmigiano; Michele Piazzai; Apostolos Tzimoulis; Nachoem Wijnberg (TARK, 2017)