"Born approximation is a familiar and convenient approximation in handling scattering problems. It is adequate, or at …"

"An important episode for my understanding of conduction problems arose from a paper by Kretschmann, ... who attacked …"

"Any theoretical physicist has met, in his introduction to the subject, the simplest examples of Schrödinger's equatio…"

"The atoms which constitute a solid consist of nuclei and electrons. For a description of the state of the solid it is…"

"1.4 Types of binding ... The most important types of force are as follows: (a) Electrostatic forces. In an ionic crys…"

"With both light and electrons, one was faced with the so-called "wave-particle duality"; both could be regarded as wa…"

"When I arrived in Leipzig, Heisenberg was working on the theory of ferromagnetism. It was known the magnetism of such…"

"His contributions to condensed matter physics were largely on fundamental questions, establishing the principles of t…"

"Richard Dalitz, in: (quote from page v)"

"It is Rudi's genius to show the reader in concrete terms how to do the predicting after some organized thinking."