Adriana Alexandru and  Ovidiu Bica and  Eleonora Tudora and  Cristina Simona Alecu and Cristina-Adriana Alexandru and  Ioan Covalcic,  Enhancing the Quality of Learning by Using an Innovative Approach for Teaching Energy in Secondary Schools.   journal   = {International Journal of Educational and Pedagogical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    September 2010, vol. 45(9). 1970 - 1974
    [viewed 27 January 2022]. Available from: https://publications.waset.org/pdf/6505.