@article{10_4064_sm_21_1_37_43,
     author = {L. Hsu},
     title = {Approximation of non-bounded continuous functions by certain sequences of linear positive operators or polynomials},
     journal = {Studia Mathematica},
     pages = {37--43},
     year = {1961},
     volume = {21},
     number = {1},
     doi = {10.4064/sm-21-1-37-43},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/sm-21-1-37-43/}
}