... concepts1
For a more detailed discussion see section 6.1.3. 
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... protons2
Until 1998 the proton energy was 820 GeV. 
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... described3
In this section, the detector configurations of the HERA-I running period are given. The HERA-II configurations are generally similar. Substantial upgrades to the HERA-I detector configurations are described in the context of the HERA-II physics program in section 7. 
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... (H14
In the H1 analysis the $ \Lambda_c$ baryon resonance was not reconstructed and the fragmentation fraction for the $ \Lambda_c$ was taken from [144]. 
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