
https://www.politicalcapital.hu/pc-admin/source/documents/zinc_revisionism_comparative.pdf

https://theconversation.com/dividendos-noticias-financieras-y-sentimientos-un-trio-que-ayuda-a-predecir-el-valor-de-mercado-de-una-empresa-225500

http://www.cer.org.uk/sites/default/files/insight_AG_CO_18.5.17.pdf