Publications from the Instituut-Lorentz in the year 1971 * Capel HW Broadening of Landau levels PHYSICA 54 (3): 361 (1971) * Fortuin CM, Kasteleyn PW, Ginibre J Correlation inequalities on some partially ordered sets COMMUN MATH PHYS 22 (2): 89 (1971) * Cukier RI, Mazur P Ergodic properties of an impurity in a harmonic oscillator chain PHYSICA 53 (2): 157 (1971 * Vlieger J Derivation of integral equation for propagation of light in dielectric crystals CAN J PHYS 49 (10): 1384 (1971) * Emid S, Vlieger J Relativistic dynamics of polarized systems .4. Classical equations of motion with radiation reaction and energy-momentum tensor for electric and magnetic dipole atoms and molecules PHYSICA 52 (3): 329 (1971) * Mazur P Note on long-time behavior of velocity-correlation functions in simple stochastic models PHYS NORV 5 (3-4): 291 (1971)