TY - JOUR TI - An introduction to out-of-plane physics AU - J. W. Van Orden PY - 1992 JO - AIP conference proceedings DO - 10.1063/1.43001 UR - https://doi.org/10.1063/1.43001 AB - The objective of this paper is to provide a short introduction of some of the theoretical issues in out‐of‐plane (e,e’X) reactions. To this end, a general form of the cross section for such reactions is presented and discussed within the context of three examples of such processes. ER -