@book{45,
  author = {Roy Helen E. and Roy D. B.},
  title = {Harmonia axyridis.  In: Handbook of Alien Species in Europe. (Ed.: DAISIE)},
  year = {2008},
  volume = {3},
  month = {2008},
  publisher = {Springer series in Invasion Ecology},
  language = {eng},
}