@misc {IOPORT.03521422,
    author       = {Delvos, Franz J\"urgen},
    title        = {Approximative Fl\"acheninterpolation.},
    howpublished = {Numer. Methoden Appr.-Theor. 3, Tag. Oberwolfach 1975, ISNM 30, 187-196 (1976).},
    year         = {1976},
    identifier   = {03521422},
}