@article{GerhardKacprzyk2022,
  author    = {Reimund Gerhard and Ryszard Kacprzyk},
  title     = {Paul B{\"o}ning - early electret researcher in Shanghai and Wroclaw (1922-1945)},
  journal   = {IEEE transactions on dielectrics and electrical insulation},
  volume    = {29},
  number    = {3},
  pages     = {853 -- 858},
  doi       = {10.1109/TDEI.2022.3168372},
  year      = {2022},
}