@article{NUMA_1975__25_132357,
     author = {W. Forst},
     title = {Zur {Optimalit\"at} interpolatorischer {Quadraturformeln} periodischer {Funktionen.-Optimal} {Formulas} of {Interpolatory} {Type} for the {Quadrature} of {Periodic} {Functions.}},
     journal = {Numerische Mathematik},
     pages = {15--22},
     publisher = {mathdoc},
     volume = {25},
     year = {1975},
     zbl = {0332.65012},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1975__25_132357/}
}