https://ies.fsv.cuni.cz/default/file/download/id/33794
http://semantic-pace.net/tools/pdf.aspx?doc=aHR0cDovL2Fzc2VtYmx5LmNvZS5pbnQvbncveG1sL1hSZWYvWDJILURXLWV4dHIuYXNwP2ZpbGVpZD0yNDQ0NCZsYW5nPUVO&xsl=aHR0cDovL3NlbWFudGljcGFjZS5uZXQvWHNsdC9QZGYvWFJlZi1XRC1BVC1YTUwyUERGLnhzbA==&xsltparams=ZmlsZWlkPTI0NDQ0
https://www.openglobalrights.org/Ending-corporate-corruption-means-looking-at-the-North-South-nexus/?lang=French
https://www.cps.org.uk/files/reports/original/201001000814-CPSUPWARDLYMOBILE2.pdf