References
| Syndial SpA | Porto Torres |
| Syndial SpA | Assemini |
| Syndial SpA | San Gavino Monreale |
| Enichem SpA | Porto Torres |
| Enichem SpA | Ottana |
| Enichem SpA | Assemini |
| Enichem SpA | Macchiareddu |
| Polymers Europe SpA | Porto Torres |
| Polymers Europe SpA | Sarroch |
| Enirisorse SpA | Portovesme |
| Enirisorse SpA | San Gavino Monreale |
| Equipolymers SPA (Group Dow Chemical Company ) | Ottana |
| Portovesme SRL | Portovesme |
| Montefibre Ltd. | Ottana |
| Sardasilicati SpA | Bones - Florinas |
| Snamprogetti SpA | Milan |
| Saipem SPA | Porto Torres |
| Saipem SPA | Sarroch |
| Tecnimont | Milan |
| Mr. Luigi SpA Contivecchi | Assemini |
| Ottana Polymers | Ottana |
| AgipPetroli SPA . | Rome |
| CTO Hospital | Iglesias |
| Autonomous Region of Sardinia |
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