J. Engelberg

Finding the Needle in a Haystack: Using Treemaps to Analyze Supplier Performance

B.M. Aller, L.A. Mallak, D.M. Lyth, 2007, PICMET '07 - 2007 Portland International Conference on Management of Engineering & Technology.

A computer controlled multi-reference clock system

Pekka Eskelinen, M. Matola, A. Salpala, 1996 .