Christhu Raj M. R. and  Rajeev Sukumaran,  Modeling and Simulation of Acoustic Link Using Mackenize Propagation Speed Equation.   journal   = {International Journal of Computer and Information Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2015, vol. 106(10). 2228 - 2236
    [viewed 24 October 2019]. Available from: https://publications.waset.org/pdf/10002837.