Arge, L. A., Procopiuc, O., Ramaswamy, S., Suel, T. & Vitter, J. S. (1998). Scalable Sweeping-Based Spatial Join. In Proceedings of 24th Annual International Conference on Very Large Databases
Kragh, H. (1998). Scintillation counter. In R. Bud, S. Johnston & D. Warner (Eds.), Instruments of Science: A Historical Encyclopedia (pp. 525-526). Garland Science.
Kragh, H. (1998). Spinthariscope. In R. Bud, S. Johnston & D. Warner (Eds.), Instruments of Science: A Historical Encyclopedia (pp. 572-573). Garland Science.