Pihera, P. a Svoboda, J. (1997) „Heterocyclic [3,2-b]-Fused Pentalenes and Their Benzoannellated Derivatives", Chemické listy, 91(8). Dostupné z: http://www-.chemicke-listy.cz/ojs3/index.php/chemicke-listy/article/view/2751 (Viděno: 29 listopad 2024).