"MONTH OF MAY SCHEDULE UPDATE". INDYCAR and Indianapolis Motor Speedway. March 26, 2020. Archived from the original on March 26, 2020. Retrieved March 26, 2020.
"MONTH OF MAY SCHEDULE UPDATE". INDYCAR and Indianapolis Motor Speedway. March 26, 2020. Archived from the original on March 26, 2020. Retrieved March 26, 2020.