Sometimes you only want, for example, published articles or theory papers. INSPIRE has two search terms to help with this:
1. type code, tc, lets you specify the type of paper:
b Book,
c Conference paper,
l Lectures,
p Published,
r Review,
t Thesis,
e.g. find t quark and tc p and tc r or find cn atlas not tc c
2. field code, fc, lets you specify what field you are interested in (based on arXiv categories but extended to non-eprints):
a Astrophysics
b Accelerators
c Computing
e Experiment-HEP
g Gravitation and Cosmology
i Instrumentation
l Lattice
m Math and Math Physics
n Theory-Nucl
o Other
p Phenomenology-HEP
q General Physics
t Theory-HEP
x Experiment-Nucl
e.g. find aff fermilab and fc b or find topcite 500+ and fc e
More search tips are available at: http://inspirehep.net/help/search-tips