@article{10_21136_AM_1969_103253,
     author = {Gregor, Ji\v{r}{\'\i}},
     title = {On the decomposition of a positive real function into positive real summands},
     journal = {Applications of Mathematics},
     pages = {429--441},
     publisher = {mathdoc},
     volume = {14},
     number = {6},
     year = {1969},
     doi = {10.21136/AM.1969.103253},
     mrnumber = {0249634},
     zbl = {0193.36803},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.1969.103253/}
}