Agile Guideline for Development of Smart Services in Manufacturing Enterprises with Support of Artificial Intelligence. - Mike Freitag 001; Oliver Hämmerle (APMS (1), 2020)

Guideline to Develop Smart Service Business Models for Small and Medium Sized Enterprises. - Mike Freitag 001; Christian Schiller; Oliver Hämmerle (APMS (5), 2021)

Digitalization of Services for Volunteers in Non-profit Organization. - Mike Freitag 001; Oliver Hämmerle (APMS (1), 2022)

Volunteering Service Engineering in Non-profit Organizations. - Michael Freitag 004; Oliver Hämmerle (APMS (1), 2023)

From Product-Service Systems to Smart Product-Service Systems. A Survey About German Companies and Practical Implications. - Christian Schiller; Mike Freitag 001; Oliver Hämmerle (APMS (6), 2024)