BALCERZAK, Andrzej. “Ultrasonic Measurements of Aqueous Solutions of [ampersand]beta;-Cyclodextrin With Alkyl Pyridinium Bromides”. Archives of Acoustics 33, no. 4 (December 31, 2008): 627–641. Accessed April 18, 2026. http://acoustics.ippt.gov.pl/index.php/aa/article/view/560.