Colombini, F., D. . Del Santo, and F. Fanelli. “Well-Posedness Results for Hyperbolic Operators With Coefficients Rapidly Oscillating in Time”. ANNALI SCUOLA NORMALE SUPERIORE - CLASSE DI SCIENZE, vol. 26, no. 4, Dec. 2025, pp. 1905-27, doi:10.2422/2036-2145.202301_017.