Quizá quiso decir: New ICMI Study Series, 1387-6872 ; 11 New ICMI Study Series, 1387-6872 ; 12 Operations Research/Computer Science Interfaces Series, 1387-666X ; 45 Operations Research/Computer Science Interfaces Series, 1387-666X ; 29 Operations Research/Computer Science Interfaces Series, 1387-666X ; 30 Operations Research/Computer Science Interfaces Series, 1387-666X ; 31 Operations Research/Computer Science Interfaces Series, 1387-666X ; 34 Operations Research/Computer Science Interfaces Series, 1387-666X ; 32 Operations Research/Computer Science Interfaces Series, 1387-666X ; 33 New ICMI Study Series, 1387-6872 ; 9 New ICMI Study Series, 1387-6872 ; 10 Operations Research/Computer Science Interfaces Series, 1387-666X ; 35 Operations Research/Computer Science Interfaces Series, 1387-666X ; 36 Operations Research/Computer Science Interfaces Series, 1387-666X ; 36 Operations Research/Computer Science Interfaces Series, 1387-666X ; 37 Operations Research/Computer Science Interfaces Series, 1387-666X ; 38 Operations Research/Computer Science Interfaces Series, 1387-666X ; 39 Operations Research/Computer Science Interfaces, 1387-666X ; 40 Operations Research/Computer Science Interfaces, 1387-666X ; 41 Operations Research/Computer Science Interfaces Series, 1387-666X ; 42