Case T-76/06: Judgment of the General Court of 16 November 2011 — ASPLA v Commission (Competition — Agreements, decisions and concerted practices — Plastic industrial bags sector — Decision finding an infringement of Article 81 EC — Exchange of individualised information — Fixing of prices and sales quotas by geographic area — Allocation of customers — Concerted bidding in response to invitations to tender — Single and continuous infringement — Extent of the infringement — Definition of the product market and the geographic market — Guidelines for the calculation of fines — Principles of equal treatment and proportionality — Aggravating and attenuating circumstances — Ceiling of 10 % of turnover)