Rapid Air for air void analysis of hardened content:
- U.H. Jakobsen: “THE RAPIDAIR SYSTEM FOR AIR VOID ANALYSIS OF HARDENED CONCRETE – A ROUND ROBIN STUDY”.
- C. Pade, U. H. Jakobsen, and J. Elsen: “NEW AUTOMATIC ANALYSIS SYSTEM FOR ANALYZING THE AIR VOID SYSTEM IN HARDENED CONCRETE”.
- T. D. Hanson: “Evaluation of the RapidAir 457 Air Void Analyzer by Iowa Department of Transportation and the Federal Highway Administration”.