Here is a repository with some pdf files for references from Edition 1 of the book (2008).
Key papers on model development and validation at STRATOS TG6 site
pdf files of more or less classic papers
Modeling strategy MDM 2001
Modeling small samples SiM 2000
Development 7 steps +
validation ABCD EHJ 2014
Performance assessment Epidemiology 2010
Internal validation JCE 2001
Calibration Achilles heel
Van Calster 2019
Updating & sample size SiM 2004
Heterogeneity in MA SiM 2019
PROGRESS paper #3: prognostic model research PMed 2013
Recipe for poor performance
JCE 2018
Framework validation
Debray JCE 2015
Personalized treatment effects
Kent BMJ 2018
TRIPOD reporting guideline 2015