@article{SJC_2020_14_3-4_a2,
     author = {Iliev, Oleg},
     title = {Improving the {Productivity} of the {E-learning} {Process}},
     journal = {Serdica Journal of Computing},
     pages = {113--144},
     publisher = {mathdoc},
     volume = {14},
     number = {3-4},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SJC_2020_14_3-4_a2/}
}