[1] D.Bourilkov, S.Petrov and H.Vankov ``Low-Energy Threshold Calculations of Extensive Air Showers with Primary Energy eV''
Journal of Physics G, 17(1991)1925.
[2] D.Bourilkov, V.Brigljevic, F.Filthaut, R.Forty, F.Harris, R.Hawkings, G. von Holtey, E.Migliore, O.Scheider, E.Valazza, J.Wenninger ``Beam Spot Position Measurement at the LEP Collider''
Nuclear Instruments and Methods A, 394(1997)103. /Preprint CERN SL-96-74 (EA)/
[3] D. Bourilkov ``Analysis of Bhabha Scattering at LEP2 and Limits on Low Scale Gravity Models''
J. High Energy Phys. 08 (1999)006; hep-ph/9907380.
[4] D. Bourilkov ``Search for TeV Strings and New Phenomena in Bhabha Scattering at CERN LEP2''
Physical Review D. 62 (2000) 076005; hep-ph/0002172.
[5] D. Bourilkov, ``Hint for Axial-vector Contact Interactions in the Data on at Centre-of-mass Energies 192-208 GeV''
Physical Review D. 64 (2001) 071701; hep-ph/0104165.
[6] O. Adriani et al., ``The L3+C Detector, a Unique Tool-set to Study Cosmic Rays'',
Nuclear Instruments and Methods A, 488(2002)209.