[en] This thesis is organized as follows. In chapter 2 the relation between the (e,e'p) coincidence cross section and the nuclear structure information is presented. The formalism to calculate the final-state interaction between the outgoing proton and the residual nucleus is introduced. The distortion of the electron in the Coulomb field of the nucleus is discussed as well and the effect of various descriptions of the electron-proton coupling on the (e,e'p) results is presented. In chapter 3 a short description of the experimental setup is given including the experimental parameters pertinent to the present experiment. Chapter 4 deals with the data taking and the subsequent analysis including the calibration techniques and the systematic error. In chapter 5 information about the effect of the final-state interaction on the momentum distributions measured in the (e,e'p) reaction is discussed in detail. Particular attention is given to the effect of different optical potentials in connection with the analysis of elastic proton scattering data. In chapter 6 and 7 the results for the reactions ⁵¹V(e,e'p)⁵⁰Ti and ⁹⁰Zr(e,e'p)⁸⁹Y are presented, respective0326Spectroscopic factors, occupation numbers and the rms radii of the individual proton orbits are presented and compared to theory. Finally in chapter 8 the main conclusions concerning the spectroscopic factors and the occupation probability of protons in orbits at and just below the Fermi surface are summarized. (Auth.)