Preparation and characterization of nanoscale humic acid-urea complex under low temperature conditions
CHENG Liang, XU Li, HOU Cuihong, LUO Tingliang, ZHANG Baolin, LIU Guoji
CIESC Journal . 2015, (7): 2725 -2736 .  DOI: 10.11949/j.issn.0438-1157.20150246