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Atualizado em 13/05/2026 · De todos da iMusic
![Cover for Rainer Hettich · Operations Research '91: Extended Abstracts of the 16th Symposium on Operations Research held at the University of Trier at September 9-11, 1991 (Paperback Book) [Softcover reprint of the original 1st ed. 1992 edition] (1992)](https://imusic.b-cdn.net/images/item/original/083/9783790806083.jpg?rainer-hettich-1992-operations-research-91-extended-abstracts-of-the-16th-symposium-on-operations-research-held-at-the-university-of-trier-at-september-9-11-1991-paperback-book&class=scaled&v=1546977552)
![Cover for Rainer Hettich · Numerische Methoden Der Approximation Und Semi-infiniten Optimierung - Teubner Studienbucher Mechanik (Paperback Book) [German, 1982 edition] (1982)](https://imusic.b-cdn.net/images/item/original/639/9783519020639.jpg?rainer-hettich-1982-numerische-methoden-der-approximation-und-semi-infiniten-optimierung-teubner-studienbucher-mechanik-paperback-book&class=scaled&v=1546977552)