PŁOWIEC, R., and K. ORZECHOWSKI. “Dipole Retardation in a Mixture of Acetamide and Calcium Nitrate”. Archives of Acoustics 19, no. 1 (March 31, 1994): 123–130. Accessed April 22, 2026. http://acoustics.ippt.gov.pl/index.php/aa/article/view/1066.