This example shows how to create citations in footnotes using biblatex. Biblatex automatically formats references and citations, much like BibTeX, but biblatex is more robust and more powerful. You can (almost certainly) use your existing .bib databases with biblatex, it comes with a wide variety of styles built in, and it's much easier to write your own custom styles.
In this example, we use the verbose-ibid style to generate footnotes with automatic “ibid.” abbreviations. For a full list of styles, see the user guide in the biblatex manual.
A TikZ figure using the beamerposter package. It shows an idealised 3D root hair cell, and its projection onto a 2D rectangular domain. The auxin symplastic pathway is indicated by purple arrows and the longitudinal auxin gradient by a shade in the 2D-domain; influx and efflux permeability arrows, indicating a polarising process, are respectively depicted in orange and light-blue. Switching fluctuation is represented by dark green arrows.