Hocek, M., Štěpnička, P., Ludvík, J., Císařová, I., Votruba, I., Řeha, D., Hobza, P. Ferrocene-modified purines as potential electrochemical markers: synthesis, crystal structures, electrochemistry and cytostatic activity of (ferrocenylethynyl)-and (ferrocenylethyl)purines. Chemistry - A European Journal. 2004, 10(8), 2058-2066. ISSN 0947-6539. E-ISSN 1521-3765.