Inamullah Bhatti and  Ahsanullah Baloch and  Khadija Qureshi,  Finite Element Modeling of Rotating Mixing of Toothpaste.   journal   = {International Journal of Chemical and Molecular Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2010, vol. 37(1). 47 - 52
    [viewed 15 October 2019]. Available from: https://publications.waset.org/pdf/8412.