Possible saturation effects at HERA and LHC in the $k_T$-factorization   approach
  We consider possible saturation effects in the structure function $F_L$ at fixed W in HERA energy range and in $b\bar b-$production at LHC energies in the framework of $k_T-$facrorization approach. 
A.V. Kotikov, A.V. Lipatov, N.P. Zotov