It seems like you're looking for references regarding. Can you please specify the type of references you are searching for? For instance, are you seeking academic papers, books, articles, websites, or something else related to sustainability? Any additional details you can provide will help me better assist you.

When it comes to client or customer stories related to sustainability, you might find compelling accounts from businesses that have made significant strides in environmental or social sustainability. These stories can be found on the websites of sustainable companies, in sustainability reports, or in case study publications by sustainability-focused organizations.

For instance, specific companies like Patagonia, IKEA, Unilever, or Interface are known for their strong sustainability commitments and often share impactful client stories on their websites or in their sustainability reports. Additionally, sustainability-focused publications and websites such as Sustainable Brands, GreenBiz, or TriplePundit often feature case studies and client stories that can provide valuable insights into sustainable business practices.

If you have a specific industry or type of sustainability initiative in mind, please feel free to provide more details so that I can tailor the recommendations more precisely.

When it comes to sustainability references in the energy industry, there are various sources you can explore for valuable insights and references. Here are a few suggestions:

1. Industry Reports and Publications: Organizations such as the International Energy Agency (IEA), the World Energy Council, and the Global Energy Association often publish reports, case studies, and articles on sustainable practices within the energy sector.

2. Corporate Sustainability Reports: Many prominent energy companies, including BP, Shell, and TotalEnergies publish annual sustainability reports that detail their efforts and progress in areas such as renewable energy investment, carbon reduction, and energy efficiency initiatives.

3. Renewable Energy Agencies: Organizations like the Renewable Energy Agency (IRENA) and the National Renewable Energy Laboratory (NREL) provide valuable research, publications, and case studies focused on sustainable energy practices and renewable energy technologies.

4. Academic Journals: Journals such as Energy Policy, Renewable and Sustainable Energy Reviews, and Energy for Sustainable Development often contain peer-reviewed articles and research papers on sustainability within the energy industry.

By exploring these sources, you can access a wealth of information and references related to sustainability in the energy sector. If you need more specific recommendations, please feel free to provide additional details.

Capgemini, as a global consultancy and technology services company, has involved in various sustainability projects across different industries. While specific details on client projects can be proprietary, there are some public examples and initiatives:

1. Sustainable IT Solutions: Capgemini has worked with organizations to develop and implement sustainable IT solutions, including data center optimization, cloud computing strategies to reduce energy consumption, and IT infrastructure sustainability assessments.

2. Renewable Energy: Capgemini has been involved in projects related to renewable energy, helping clients assess the and implementation of renewable energy technologies such as solar, wind, and hydroelectric power.

3. Sustainability Reporting: Capgemini has assisted clients in developing and implementing sustainability reporting frameworks, helping companies measure and report on their environmental, social, and governance (ESG) performance.

4. Supply Chain Sustainability: Capgemini has collaborated with organizations to optimize and enhance sustainable practices within their supply chains, including initiatives related to responsible sourcing, ethical procurement, and supplier sustainability assessments.

These are just a few examples of the types of sustainability projects Capgemini has been involved in. For more specific details or case studies, I would recommend reaching out directly to Capgemini's corporate communications or sustainability teams.