Abraham, D., I. Şufaru, and S. Chelcea. “ Influenţă Sau Manipulare Prin Sondaje De Opinie? Influence or Manipulation by Means of Surveys?”. Sociologie Românească, Vol. 6, no. 3-4, Dec. 2008, pp. 18-29, https://arsociologie.ro/revistasociologieromaneasca/sr/article/view/2008_3_4_abraham.