The paper "Smart Sustainable Cities of the Future: An Extensive Interdisciplinary Literature Review" by Simon Elias Bibri and John Krogstie provides a comprehensive overview of the field of smart and sustainable cities. It explores the underlying foundations, state-of-the-art research, research opportunities, emerging trends, and future planning practices. The authors review existing sustainable city models and smart city approaches, discussing their strengths and weaknesses in terms of contributing to sustainable development goals. They identify gaps in the research and propose an integrated approach based on applied theoretical perspectives to address these gaps. The paper highlights the importance of ICT in urban sustainability and the need for innovative solutions to overcome challenges in sustainable urban planning and development. It concludes that the field of smart sustainable cities is rapidly gaining momentum and is crucial for addressing the environmental and social sustainability challenges of urbanization.The paper "Smart Sustainable Cities of the Future: An Extensive Interdisciplinary Literature Review" by Simon Elias Bibri and John Krogstie provides a comprehensive overview of the field of smart and sustainable cities. It explores the underlying foundations, state-of-the-art research, research opportunities, emerging trends, and future planning practices. The authors review existing sustainable city models and smart city approaches, discussing their strengths and weaknesses in terms of contributing to sustainable development goals. They identify gaps in the research and propose an integrated approach based on applied theoretical perspectives to address these gaps. The paper highlights the importance of ICT in urban sustainability and the need for innovative solutions to overcome challenges in sustainable urban planning and development. It concludes that the field of smart sustainable cities is rapidly gaining momentum and is crucial for addressing the environmental and social sustainability challenges of urbanization.