The response of river nitrification to changes in wastewater treatment (The case of the lower Seine River downstream from Paris)Najla Aissa-Grouz, Josette Garnier, Gilles Billen, Benjamin Mercier and Anunciacion MartinezAnn. Limnol. - Int. J. Lim., 51 4 (2015) 351-364DOI: https://doi.org/10.1051/limn/2015031