Synthesis of C3-Symmetric Cinchona-Based Organocatalysts and Their Applications in Asymmetric Michael and Friedel-Crafts Reactions - Péter Kisszékelyi; Zsuzsanna Fehér; Sándor Nagy; Péter Bagi; Petra Kozma; Zsófia Garádi; Miklós Dékány; Péter Huszthy; Béla Mátravölgyi; József Kupai (Symmetry, 2021)