Petzelt, J., Železný, V., Ostapchuk, T. Far-infrared spectroscopy of thin films. ISBN 3-8265-4960-0. In: HOFFMANN, S., SCHNELIER, T., WASER, R., eds. COST 514. Ferroelectric Ceramic Thin Films. Final Report 1999. Aachen: RWTH Aachen, 1999, s. 112-117. EUR 18901.