@misc{indiciaebdb8d469bae9,
  title = {An invariance principle for dynamical systems in Hilbert spaces},
  author = {Infante, E. F. and Slemrod, M.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19690001002},
  note = {Source identifier: 19690001002}
}