Siemens Mobility (February 22, 2019). "Caltrans/ IDOT New Single-Level Passenger Railcars: 'CALIDOT'"(PDF). Next Generation Equipment Committee – 2019 Annual Meeting. American Association of State Highway and Transportation Officials. Archived from the original(PDF) on November 24, 2019. Retrieved May 26, 2020.
Gradinger, Kyle; Tamaoki, Momoko (February 21, 2020). "Multi-state Single Level Rail Cars Procurement Updates"(PDF). California Department of Transportation Division of Rail and Mass Transportation. Archived from the original(PDF) on September 22, 2020. Retrieved May 15, 2020.
Siemens Mobility (February 22, 2019). "Caltrans/ IDOT New Single-Level Passenger Railcars: 'CALIDOT'"(PDF). Next Generation Equipment Committee – 2019 Annual Meeting. American Association of State Highway and Transportation Officials. Archived from the original(PDF) on November 24, 2019. Retrieved May 26, 2020.
Paul, Joe Sr.; Welsh, Michael; Kraft, Michael (February 2024). "Amtrak New Fleet Acquisition Updates"(PDF). Next Generation Corridor Equipment Pool Committee. Archived from the original(PDF) on April 2, 2024.
Siemens Mobility (February 22, 2019). "Caltrans/ IDOT New Single-Level Passenger Railcars: 'CALIDOT'"(PDF). Next Generation Equipment Committee – 2019 Annual Meeting. American Association of State Highway and Transportation Officials. Archived from the original(PDF) on November 24, 2019. Retrieved May 26, 2020.
Gradinger, Kyle; Tamaoki, Momoko (February 21, 2020). "Multi-state Single Level Rail Cars Procurement Updates"(PDF). California Department of Transportation Division of Rail and Mass Transportation. Archived from the original(PDF) on September 22, 2020. Retrieved May 15, 2020.
Siemens Mobility (February 22, 2019). "Caltrans/ IDOT New Single-Level Passenger Railcars: 'CALIDOT'"(PDF). Next Generation Equipment Committee – 2019 Annual Meeting. American Association of State Highway and Transportation Officials. Archived from the original(PDF) on November 24, 2019. Retrieved May 26, 2020.
Paul, Joe Sr.; Welsh, Michael; Kraft, Michael (February 2024). "Amtrak New Fleet Acquisition Updates"(PDF). Next Generation Corridor Equipment Pool Committee. Archived from the original(PDF) on April 2, 2024.