  | Bleus, H., & Crutzen, N. (22 June 2021). Innovation ecosystem - Sustainable entrepreneurship for Circular Economy [Paper presentation]. ISPIM Innovation Conference - Innovating our Common Future. |
Bleus, H., Clement, J., & Crutzen, N. (03 May 2021). Sustainable Business Models for Circular Economy – The case of Brussels Built Environment [Paper presentation]. Accounting for Sustainable Development in the Anthropocene, Nantes (Online), France. |
Bleus, H., & Crutzen, N. (03 December 2020). Sustainable Business Models for Circular Economy in Urban Ecosystem -A Case Study of Brussels Built Environment [Paper presentation]. ICEC 2020 – Circulus, science for a circular economy, Freiburg (Online because of covid), Germany. |
 | Bleus, H., & Crutzen, N. (09 June 2020). Sustainable Business Models for Circular Economy in Urban Ecosystem [Paper presentation]. ISPIM Innovation Conference – Innovating in Times of Crisis, Virtual (Covid-19, initialy Berlin), Germany. |
 | Bleus, H., & Crutzen, N. (12 July 2019). How are Sustainable Business Models developed to support the implementation of Circular Economy in Cities? A qualitative research on built environment [Paper presentation]. Smart and Sustainable cities: Smart Buildings in Smart cities, Lille, France. |
 | Nguyen, C. T.-L., Bleus, H., Van Bockhaven, J., & Crutzen, N. (2018). SMART CITY : DE PRAKTISCHE GIDS. Smart City Institute. |
 | Bleus, H., & Crutzen, N. (19 June 2018). Business Model and Smart City, a literature review [Paper presentation]. The ISPIM Innovation Conference – Innovation, The Name of The Game, Stockholm, Sweden. |
 | Nguyen, C. T.-L., Bleus, H., Van Bockhaven, J., Crutzen, N., & Basile, C. (2018). Smart City - Le Guide Pratique - Tome 2 - Comment Rendre le Citoyen Acteur de son Territoire? Liege, Belgium: Smart City Institute. |
 | Bounazef, D., Van Caillie, D., Salaouatchi, H., & Bleus, H. (September 2017). La force de la sous-culture de responsabilité comme condition d’amélioration continue dans l’hôpital [Paper presentation]. CALASS 2017, Liège, Belgium. |
Bleus, H., & Crutzen, N. (June 2017). Business Models for Smart City – a means to achieve sustainability? [Paper presentation]. 21st EMAN Conference Sustainability Accounting and Control for Smart Cities, Liège, Belgium. |
Crutzen, N., Bounazef, D. (Other coll.), & Bleus, H. (Other coll.). (2017). Smart cities et la participation des citoyens [Paper presentation]. Charleroi Creative forum 5, Charleroi, Belgium. |
 | Nguyen, C. T.-L., Bleus, H., Van Bockhaven, J., & Crutzen, N. (2017). Smart City: Le Guide Pratique. Smart City Institute. |