@article{JDM_1967__70_146567,
     author = {Gen-Ichiro Sunouchi},
     title = {Derivatives of a {Polynomial} of {Best} {Approximation.}},
     journal = {Jahresbericht der Deutschen Mathematiker-Vereinigung},
     pages = {165--166},
     publisher = {mathdoc},
     volume = {70},
     year = {1967},
     zbl = {0286.42009},
     url = {http://geodesic.mathdoc.fr/item/JDM_1967__70_146567/}
}