1. Abdelkader Derbali ,(2018), ‘How the Default Probability is defined by the CreditRisk+ Model?’
https://hal.archives-ouvertes.fr/hal-01696011/document
2. Alexis Derviz, Narcisa Kadlčakova, (2001), ‘Methodological Problems Of Quantitative Credit Risk Modeling In The Czech Economy’
https://www.cnb.cz/export/sites/cnb/en/economic-research/.galleries/research_publications/mp_wp/download/WP39_Derviz_Kadlcakova.pdf
3. Amogh Deshpande ,Srikanth K. Iyer (2009), ‘The CreditRisk+ Model with General Sector Correlations’
https://www.researchgate.net/publication/225622618_The_credit_risk_model_with_general_sector_correlations