C., E. HARALD WESTERGAARD: Scope and Method of Statistics. Quarterly Publications of the American Statistical Association. September. Nationaløkonomisk Tidsskrift, [S. l.], v. 3, 1916. Disponível em: https://tidsskrift.dk/nationaloekonomisktidsskrift/article/view/59371. Acesso em: 14 mar. 2025.