@Book{OL3679055M,
    title: {Introduction to cosmology},
    author: {Matts Roos},
    publisher: {Wiley},
    year: {2003},
    place: {Chichester, West Sussex, England},
}

@Work{OL6099041W,
    title: {An introduction to the science of cosmology},
    author: {Derek J. Raine},
    first_publish_year: {2001}
}

@Author{OL1551906A,
    name: {Derek J. Raine},
    birth_date: {1946}
}