Translate the following English sentence to French:
"On the other hand, there are the trading systems which have just been created in the Netherlands and Denmark, where there are still many administrative and technical problems to resolve."
De l' autre côté, nous avons les systèmes de trading qui viennent de naître aux Pays-Bas, au Danemark, où il restera beaucoup de problèmes administratifs et techniques à résoudre.