no. R2
Estimates for spline projections
Revue française d'automatique, informatique, recherche opérationnelle. Analyse numérique, Tome 10 (1976) no. R2, pp. 5-37 
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     author = {Bramble, J. H. and Schatz, A. H.},
     title = {Estimates for spline projections},
     journal = {Revue fran\c{c}aise d'automatique, informatique, recherche op\'erationnelle. Analyse num\'erique},
     pages = {5--37},
     year = {1976},
     publisher = {Dunod},
     volume = {10},
     number = {R2},
     mrnumber = {436620},
     zbl = {0343.65045},
     language = {en},
     url = {https://www.numdam.org/item/M2AN_1976__10_2_5_0/}
}
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Bramble, J. H.; Schatz, A. H. Estimates for spline projections. Revue française d'automatique, informatique, recherche opérationnelle. Analyse numérique, Tome 10 (1976) no. R2, pp. 5-37. https://www.numdam.org/item/M2AN_1976__10_2_5_0/

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