Source: http://www.etancheite.com/Files/pub/fede_D31/DEP_ACTUALITE_4184/fab200cdd5c842f9ba986fadd0a2c409/PJ/Guide%20les%20garanties%20dans%20les%20march%C3%A9s%20publics%20et%20priv%C3%A9s%20de%20travaux.pdf