Mihaela Negreanu, Enrique Zuazua. Uniform observability of the wave equation via a discrete Ingham inequality. In 44th IEEE IEEE Conference on Decision and Control and 8th European Control Conference Control, CDC/ECC 2005, Seville, Spain, 12-15 December, 2005. pages 3158-3163, IEEE, 2005. [doi]
Abstract is missing.