@article{NUMA_1982__40_132811,
     author = {M. Levin},
     title = {Optimal {Quadrature} {Formula} of {Markov's} and {Locher's} {Type} with {Weight} {Function}},
     journal = {Numerische Mathematik},
     pages = {31--38},
     publisher = {mathdoc},
     volume = {40},
     year = {1982},
     zbl = {0529.41026},
     url = {http://geodesic.mathdoc.fr/item/NUMA_1982__40_132811/}
}