@article{MZ_1984__186_173428,
     author = {Georgi Iliev and Walter Pollul},
     title = {Convex {Interpolation} with {Minimal} {L...-Norm} of the {Second} {Derivative.}},
     journal = {Mathematische Zeitschrift},
     pages = {49--56},
     publisher = {mathdoc},
     volume = {186},
     year = {1984},
     url = {http://geodesic.mathdoc.fr/item/MZ_1984__186_173428/}
}