  My thesis contains an introduction to Light-front Hamiltonian field theory
and updates of published articles: - "Equivalence of Covariant and Light-Front
Perturbation Theory" (hep-ph/9702311 and hep-ph/9806365, N. C. J.
Schoonderwoerd and B. L. G. Bakker, published in Phys.Rev.D) and -
"Entanglement of Fock-space expansion and covariance in light-front Hamiltonian
field theory" (hep-ph/9806365, N. C. J. Schoonderwoerd, B. L. G. Bakker and
V.A. Karmanov, accepted for publication in Phys.Rev.C.)
