• https://repository.nwu.ac.za/handle/10394/35045
• https://repository.nwu.ac.za/handle/10394/35047
• https://repository.nwu.ac.za/handle/10394/35048
• https://repository.nwu.ac.za/handle/10394/35054
• https://repository.nwu.ac.za/handle/10394/35042
• https://repository.nwu.ac.za/handle/10394/35043
• https://repository.nwu.ac.za/handle/10394/35046
• https://repository.nwu.ac.za/handle/10394/35050
• https://repository.nwu.ac.za/handle/10394/35051
• https://repository.nwu.ac.za/handle/10394/35053
• https://repository.nwu.ac.za/handle/10394/35049
• https://repository.nwu.ac.za/handle/10394/35052
• https://repository.nwu.ac.za/handle/10394/35057
• https://repository.nwu.ac.za/handle/10394/35058