@article{buathong2013nitrogen,
  title = {Nitrogen Flow Analysis in Bangkok City, Thailand: Area Zoning and Questionnaire Investigation Approach}
  author = {Buathong, Thapanee; Boontanon, Suwanna Kitpati; Boontanon, Narin; Surinkul, Nawatch; Harada, Hidenori; Fujii, Shigeo},
  journal = {Procedia Environmental Sciences},
  url = {http://www.sciencedirect.com/science/article/pii/S1878029613000765},
  doi = {10.1016/j.proenv.2013.02.074},
  year = {2013}
}