35L85 Linear hyperbolic unilateral problems and linear hyperbolic variational inequalities [See also 35R35, 49J40] 233

35L86 Nonlinear hyperbolic unilateral problems and nonlinear hyperbolic variational inequalities [See also 35R35, 49J40] 27

35L87 Unilateral problems and variational inequalities for hyperbolic systems [See also 35R35, 49J40] 11