WASET
    Kriengkrai Assawamartbunlue and  Channarong Wantha,  Experimental Investigation on the Optimal Operating Frequency of a Thermoacoustic Refrigerator.   journal   = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology.
    April 2015, vol. 101(5). 784 - 787
    [viewed 29 March 2024]. Available from: https://publications.waset.org/pdf/10001267.