Jansohn, R.: The Use of Probability Density Functions for Processing of Ultrasonic Texture Images of Concrete. Darmstadt Concrete Vol. 14, Darmstadt 1999

Kroggel, O.: Aktuelle Fallbeispiele für den erfolgreichen ZfP-Einsatz: - Nachweis der Dichtheit von Betonkonstruktionen entsprechend dem Wasserhaushaltsgesetz - Estrich-Haftung. DGZfP Fachtagung Bauwerksdiagnose 1999

Jansohn, R.; Schickert, M.: Objective Interpretation of Ultrasonic Concrete Images. 7th European Conference on Non Destructive Testing (ECNDT), Copenhagen 1998

Kroggel, O.; Jansohn, R.; Ratmann, M.: Crack Characterisation Through Ultrasound Reflection. Seventh International Conference on Structural Faults + Repair, July 8th - 10th, Edinburgh 1997

Jansohn, R.; Kroggel, O.; Ratmann, M.; Wiese, S.: Progress in the Estimation of Crack Depth Utilising Ultrasonic Impulse-Echo-Technique. Darmstadt Concrete Vol. 12, Darmstadt 1997

Jansohn, R.; Schickert, M.; Kroggel, O.; Heidt, H.: Towards the Evaluation of SAFT-Images for Non-Destructive Testing Ultilising Statistical Image Processing. Darmstadt Concrete Vol. 12, Darmstadt 1997

Bauer, T.; Hög, R.; Jansohn, R.; Swarup, J.: Assessment of Corrosion of Reinforcement Utilising Ultrasound Backscatter Technique and Half-Cell Potentials. Darmstadt Concrete Vol. 11, Darmstadt 1996

Jansohn, R.; Kroggel, O.; Ratmann, M.: Examination of Crack Depth in Concrete Utilising Ultrasonic Impulse-Echo-Technique. Darmstadt Concrete Vol. 11, Darmstadt 1996

Jansohn, R.; Kroggel, O.; Ratmann, M.: Detection of Tendon Ducts Utilising the Ultrasonic Pulse Echo Method - An Inter-Laboratory Test at BASt. Darmstadt Concrete Vol. 11, Darmstadt 1996

Jansohn, R.; Kroggel, O.; Ratmann, M.: Ultrasonic Pulse Echo Testing of Floor Slabs Made of Steel Fibre Concrete - First Results, Darmstadt Concrete Vol. 11, Darmstadt 1996

Grübl, P.; Kroggel, O.; Jansohn, R.; Ratmann, M.: Die zerstörungsfreie Prüfung von Betonbauteilen mit dem Ultraschall-Impuls-Echo-Verfahren. Beton- und Stahlbetonbau 91, Heft 12, Dezember 1996

Kroggel, O.; Jansohn, R.; Ratmann, M.: Novel Ultrasound System to Detect Voided Ducts in Post-tensioned Bridges. Sixth International Conference on Structural Faults + Repair, July 3rd - 5th, London 1995

Jansohn, R.; Kroggel, O.; Ratmann, M.: Detection of Thickness, Voids, Honeycombs and Tendon Ducts Utilising Ultrasonic Impulse-Echo-Technique. International Symposium Non-Destructive Testing in Civil Engineering (NDT-CE), September 26th - 28th, Berlin 1995

Jansohn, R.; Kroggel, O.; Ratmann, M.: Detection of Corroded Reinforcement Utilising Ultrasound Backscatter Technique. Darmstadt Concrete Vol. 10, Darmstadt 1995

Jansohn, R.; Kroggel, O.; Ratmann, M.: Detection of Tendon Ducts with the Ultrasonic Impulse Echo Method - An Inter-Laboratory Test at BAM, Berlin, Darmstadt Concrete Vol. 10, Darmstadt 1995

Kroggel, O.; Jansohn, R.; Ratmann, M.: Fortschritte bei der Anwendung der Ultraschall-Impuls-Echo-Technik am Beton. Deutsche Gesellschaft für Zerstörungsfreie Prüfung e. V., DGZfP-Jahrestagung 9. - 11. Mai 1994 in Timmendorfer Strand

Kroggel, O.; Jansohn, R.; Ratmann, M.: Trennrißerkennung. Beton- und Stahlbetonbau 89, Heft 7, Juli 1994

Kroggel, O.; Jansohn, R.; Ratmann, M.: Progress in Application of Ultrasound in Pulse-Echo-Technique to Examine Concrete Structures. 6th European Conference on Non Destructive Testing (ECNDT), Nice, October 1994

Jansohn, R.; Kroggel, O.; Ratmann, M.: Progress in the Examination of Concrete Structures with Ultrasound Pulse-Echo-Technique. Darmstadt Concrete Vol. 9, Darmstadt 1994

Jansohn, R.; Kroggel, O.; Ratmann, M.: Novel Strategy for the Measurement and Interpretation of Backscattered Ultrasound in Concrete. Darmstadt Concrete Vol. 8, Darmstadt 1993

Kroggel, O.; Jansohn, R.: Ultrasonic Examination of Cracks in Concrete. Darmstadt Con­crete Vol. 7, Darmstadt 1992