Classical field theory

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Cosmological non-linearities as an effective fluid (2010, methodology): “(1.4) The stress-energy pseudo-tensor has a long history in studies of General Relativity (e.g. as an approach to studying gravitational raditation; see the books by Weinberg [18] or Landau and Lifshitz [19]) and will play a key role in this paper.”
Lectures on non-equilibrium effective field theories and fluctuating hydrodynamics (2018, background): “The search for an action principle for fluids has a long history, dating back at least to [71] and subsequent work including [72, 73] (see [74, 75, 76] for reviews), all of which were for ideal fluids.”
Transverse and longitudinal angular momenta of light (2015, background): “In all other situations these differ by the so-called ‘‘spin momentum’’ contribution introduced by Belinfante in field theory and non-measurable in basic light–matter interactions [14,23,25,30,34,50,54].”
Effective field theory of dissipative fluids (2015, background): “The search for an action principle for fluids has a long history, dating back at least to [22] and subsequent work including [23, 24] (see [25–27] for reviews), essentially all of which were for ideal fluids.”