The definitive guidance for project sponsors

http://globalpmstandards.org/tools/tools-for-assessment/project-sponsors/

Measures for Assuring Projects – APM toolkit

https://www.apm.org.uk/resources/find-a-resource/measures-for-assuring-projects-apm-toolkit/

Managing simple projects

https://www.praxisframework.org/library/preface

A new orientation to deal with uncertainty in projects

http://www.sciencedirect.com/science/article/pii/S0263786315001787

Excessive software development: Practices and penalties

http://www.sciencedirect.com/science/article/pii/S026378631630182X