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< Prof. [[Ryszard Urbański]] takes part in the 21th European Conference on Operational Research in Reykjavík (Iceland) from 2006-06-30 to 2006-07-10.
do
> Prof. [[Ryszard Urbański]] took part in the 21th European Conference on Operational Research in Reykjavík (Iceland) from 2006-06-30 to 2006-07-10.
Prof. Ryszard Urbański took part in the 21th European Conference on Operational Research in Reykjavík (Iceland) from 2006-06-30 to 2006-07-10.