  A study of differential cross sections for the production of four jets in
multi-Regge kinematics is presented, the main focus lying on azimuthal angle
dependences. The theoretical setup consists in the jet production from a single
BFKL ladder with a convolution of three BFKL Green functions, where two
forward/backward jets are always tagged in the final state. Furthermore, the
tagging of two further jets in more central regions of the detectors with a
relative separation in rapidity from each other is requested. It is found, as
result, that the dependence on the transverse momenta and the rapidities of the
two central jets can be considered as a distinct signal of the onset of BFKL
dynamics.
