I. Oral and  E. Bozkurt and  H. Guzel,  The Effect of Combining Real Experimentation With Virtual Experimentation on Students-Success.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    June 2009, vol. 30(6). 1191 - 1196
    [viewed 19 April 2021]. Available from: https://publications.waset.org/pdf/4122.