@article{700219,
     title = {Problems of optimization of numerical mathematics},
     booktitle = {Differential Equations and Their Applications},
     series = {GDML\_Books},
     publisher = {Slovensk\'e pedagogick\'e nakladate\v lstvo},
     address = {Bratislava},
     year = {1967},
     pages = {15-25},
     mrnumber = {MR0251886},
     zbl = {0183.43803},
     url = {http://dml.mathdoc.fr/item/700219}
}

Babuška, Ivo. Problems of optimization of numerical mathematics, dans Differential Equations and Their Applications, GDML_Books,  (1967), pp. 15-25. http://gdmltest.u-ga.fr/item/700219/