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Kellerer, Hans and Strusevich, Vitaly A. (2008) Fully polynomial approximation schemes for a symmetric quadratic knapsack problem and its scheduling applications. Algorithmica, 57 (4). pp. 769-795. ISSN 0178-4617 (Print), 1432-0541 (Online) (doi:10.1007/s00453-008-9248-1)

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Shakhlevich, Natalia V. and Strusevich, Vitaly A. (2007) Preemptive scheduling on uniform parallel machines with controllable job processing times. Algorithmica, 51 (4). pp. 451-473. ISSN 0178-4617 (Print), 1432-0541 (Online) (doi:10.1007/s00453-007-9091-9)