@article{PA_2020_9_3_a8,
     author = {L. Matej{\'\i}\v{c}ka},
     title = {A solution to fourth {Qi's} conjecture on a complete monotonicity},
     journal = {Problemy analiza},
     pages = {131--136},
     publisher = {mathdoc},
     volume = {9},
     number = {3},
     year = {2020},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PA_2020_9_3_a8/}
}