E. A. Avksentyev, “The Great Emch Closure Theorem and a combinatorial proof of Poncelet's Theorem”, Mat. Sb., 206:11 (2015), 3–18; Sb. Math., 206:11 (2015), 1509–1523
E. A. Avksentyev, “A universal measure for a pencil of conics and the Great Poncelet Theorem”, Mat. Sb., 205:5 (2014), 3–22; Sb. Math., 205:5 (2014), 613–632