@article{Marotta:2000+D,
  author = "Marotta, Raffaele  and  Pezzella, F.",
  title = "{String-generated quartic scalar interactions}",
  doi = "10.22323/1.004.0033",
  journal = "PoS",
  year = 2000,
  volume = "tmr99",
  pages = "033"
}