(1)
Boldrini, J. L. .; Fernández-cara, E. .; Rojas-medar, M. A. . An Optimal Control Problem for a Generalized Boussinesq Model: The Time Dependent Case. Rev. mat. complut. 2007, 20 ,2, 339-366. https://doi.org/10.5209/rev_REMA.2007.v20.n2.16487.