@inproceedings(1998-locally-threshold-testable-languages-in-the-strict-sense-application-to-the-inference-problem,
  author = {José Ruiz and Salvador España Boquera and Pedro García},
  title = {Locally Threshold Testable Languages in the Strict Sense: Application to the Inference Problem},
  year = {1998},
  booktitle = {International Colloquium on Grammatical Inference (ICGI)},
  address = {Ames, Estados Unidos},
  pages = {150-161}
)