Tezer, M., E. Yildiz, S. Bozkurt, and H. Tangul. “The Influence of Online Mathematics Learning on Prospective Teachers Mathematics Achievement: The Role of Independent and Collaborative Learning”. World Journal on Educational Technology: Current Issues, Vol. 11, no. 4, Oct. 2019, pp. 257-65, doi:10.18844/wjet.v11i4.4361.