Aharonian, F. A.: Very High Energy Gamma Rays and Origin of Cosmic Rays. XXII Texas Symposium on Relativistic Astrophysics, Stanford, California, U.S.A. (2004)

Kirk, J. G.: Particle Acceleration in Relativistic Flows. 22nd Texas Symposium on Relativistic Astrophysics, Palo Alto, CA, USA (2004)

Kirk, J. G.: Particle Acceleration in Relativistic Flows. 22nd Texas Symposium on Relativistic Astrophysics, Stanford (2004)

Heusser, G.: Low Level counting from meteorites to neutrinos: Ge sprectroscopy, proportional counting, multicoincidence NaI, rare gas mass spectroscopy. Topical Workshop in Low Radiactivity Techniques, Sudbury, Canada (2004)

Simgen, H.: Adsorption techniques for gas purification. Topical Workshop in Low Radioactivity Techniques, Sudbury / Canada (2004)

Zuzel, G.: Highly sensitive measurements of 222Rn emanation and diffusion. Topical Workshop in Low Radioactivity Techniques, Sudbury / Canada (2004)

Simgen, H.: Ultrapure gases for the BOREXINO and GERDA experiments. Gentner-Seminar, Max-Planck-Institut fuer Kernphysik Heidelberg (2004)

Schönert, S.: Cutting Edge Projects in Low-Energy Particle Physics and Astrophysics: GERDA & Double-CHOOZ. Symposium on ‘Cross Roads in Particle and Astrophysics’ at the MPIK Heidelberg, Heidelberg (2004)

Aharonian, F. A.: Probing magnetic fields in Supernova Remnants and Pulsar-Driven Nebulae with Hard X-rays and High Energy Gamma-Rays. International Conference "Magnetic fields in the Universe: from laboratory and stars to the primordial structures, Angra dos Reis, Brazil (2004)

Schoenert, S.: Ovββ Decay Search with ⁷⁶Ge: Status and Future perspectives. Gemeinsames Kern- und Astroteilchenphysikalisches Seminar der Universitäten Karlsruhe, Heidelberg und Tübingen, sowie des Forschungszentrums Karlsruhe, Graduiertenkolleg "Hochenergiephysik und Teilchenastrophysik" der Universität Karlsruhe, Karlsruhe, Germany (2004)

Heusser, G.: Low Level Germanium Gamma Spectroscopy at the micorBq Level and Future Developments towards Higher Sensitivity. International Conference on Isotopes in Environmental Studies, Aquatic Forum 2004, Monte-Carlo, Monaco (2004)

Popescu, C. C.: Modelling the UV/submm SED of Normal Galaxies. International Workshop on the Spectral Energy Distribution of Gas-Rich Galaxies: Confronting Models with Data, Heidelberg, Germany (2004)

Tuffs, R. J.: Gas-Rich Galaxies in the Far-Infrared - the Legacy of ISOPHOT. International Workshop on the Spectral Energy Distribution of Gas-Rich Galaxies: Confronting Models with Data, Heidelberg, Germany (2004)

Schönert, S.: Double Beta Decay Experiments. Lecture at the German Physical Society (DPG) School "Neutrino Physics: from the laboratory to the Cosmos", Physikzentrum Bad Honnef (2004)

Schönert, S.: The new Germanium-76 double beta decay experiment at LNGS. Neutrino Oscillation Workshop 2004 (NOW 2004), Conca Specchiulla, Otranto, Italy (2004)

Aharonian, F. A.: Sources of very high energy gamma rays. International Symposium "Astrophysics and Cosmology after Gamow - Theory and Observations", Odessa, Ukraine (2004)

Völk, H. J.: Origin of the Galactic Cosmic Rays and Gamma-Ray Astronomy. 3rd International Workshop on Ultra High Energy Cosmic Rays, Leeds, U.K. (2004)

Hirotani, K.: Theories of High-energy Emission from Pulsars. 35th COSPAR Scientific Assembly, Paris, France (2004)

Kirk, J. G.: New insights into pulsar magnetospheres and winds? COSPAR Scientific Assembly, Paris, France (2004)

Aharonian, F. A.: TeV gamma rays from the Galactic Center: Direct and indirect links to the massive Black Hole in Sgr A*. International Workshop "From X-ray Binaries to Quasars: Black Hole Accretion on All Mass Scales, Amsterdam, Netherlands (2004)