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