@article{10_2298_FIL2106899A,
     author = {George A Anastassiou},
     title = {Advanced ordinary and fractional approximation by positive sublinear operators},
     journal = {Filomat},
     pages = {1899 },
     year = {2021},
     volume = {35},
     number = {6},
     doi = {10.2298/FIL2106899A},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.2298/FIL2106899A/}
}