Propositional Forms of Judgemental Interpretations

BibTeX does not have the right entry for preprints. This is a hack for producing the correct reference:

@Booklet{EasyChair:221,
  author = {Tao Xue and Zhaohui Luo and Stergios Chatzikyriakidis},
  title = {Propositional Forms of Judgemental Interpretations},
  howpublished = {EasyChair Preprint no. 221},
  doi = {10.29007/kv25},
  year = {EasyChair, 2018}}