Reference papers for Leptoquarks :
``Leptoquarks in lepton-quark Collisions",
W. Buchmuller, R. Ruckl, D. Wyler,
DESY-86-150, Nov 1986. 21pp.
The reference paper for LQs at HERA. There you find
the expressions for the matrix elements. Note that some
of the interference terms with DIS had the wrong sign
in the original publication. The corrected signs can
be found in the Erratum.
``Model Independent Constraints on Leptoquarks from Rare
S. Davidson, D. Bailey, B.A. Campbell,
Published in Z.Phys.C61:613-644,1994.
Indirect limits for LQs with or without Lepton
``Formation and Decay of Scalar Leptoquarks/Squarks
in ep Collisions",
T. Plehn, H. Spiesberger, M. Spira, P. M. Zerwas,
Published in Z.Phys. C74 (1997) 611-614.
References for Light Stop :
``Possible excess in charged current events with high Q**2 at
HERA from stop and sbottom production",
T. Kon, T. Matsushita, T. Kobayashi,
``Stop and sbottom production at HERA",
T. Matsushita, T. Abe, S. Kitamura, T. Kobayashi, T. Kon,
Proceedings of Monte Carlo Generators for HERA Physics (July 99),
``Stops in R Parity breaking model for high-Q**2 events at HERA",
T. Kon, T. Kobayashi,