Chen Bingru,  Duration Patterns of English by Native British Speakers and Mandarin ESL Speakers.   journal   = {International Journal of Cognitive and Language Sciences}, [online]. World Academy of Science, Engineering and Technology.
    February 2019, vol. 147(3). 164 - 172
    [viewed 23 October 2019]. Available from: https://publications.waset.org/pdf/10010179.