@article{RubtsovOganessyanGorboulevetal.1988,
  author    = {P. M. Rubtsov and R. G. Oganessyan and Valentin G. Gorboulev and K. G. Skryabin and A. A. Bayev},
  title     = {Genetic engineering of peptide hormones : II. Possible polymorphism of preprolactin in cattle. Data of molecular cloning},
  year      = {1988},
}