@article{BaerBandara2022,
  author    = {Christian B{\"a}r and Lashi Bandara},
  title     = {Boundary value problems for general first-order elliptic differential operators},
  journal   = {Journal of functional analysis},
  volume    = {282},
  number    = {12},
  doi       = {10.1016/j.jfa.2022.109445},
  year      = {2022},
}