MAREK, Radek, Vladimír SKLENÁŘ,
Jiří DOSTÁL and Jiří SLAVÍK. Determination of a Symmetrical Dimer Structure in Benzo[c]phenanthridine Alkaloids by Pulsed-Field-Gradient HMBC.
Tetrahedron Letters. Oxford: Pergamon - Elsevier Science, 1996, vol. 37, No 10, p. 1655-1658. ISSN 0040-4039.