  $pp\to pp\pi^0$ and $pp\to pp\eta$ were considered close to threshold. The
pion production was found not only to be dominated by impulse approximation
(IA) and rescattering contributions, but also strongly by box-diagrams,
resonances and heavy-meson exchanges. New relevant contributions for the IA
were found. The role of the offshell behaviour of nucleon-resonance couplings
($P_{11}(1440), S_{11}(1535)$) and of interference effects for the eta
production was investigated. The results opened a large door for microsopic
understanding of short range physics. A covariant model for $pp\to pp\eta$
being under construction is going to be finished.
