Comparing GPS and cell-based mobile phone data to identify activity participation during the COVID-19 pandemic. - Sebastian Alexander Müller; Sydney Paltra; Jakob Rehmann; Ricardo Ewert; Kai Nagel (EPJ Data Sci., 2024)

Showing the Feasibility of Electric Waste Collection Vehicles in Rural Areas: A Case Study in the Vulkaneifel District, Germany. - Ricardo Ewert; Philip Cuong Minh Nguyen; Kai Nagel (ANT/EDI40, 2025)