@article{21,
  author = {Daniel Kahneman and Alan Krueger and David Schkade and Norbert Schwarz and Arthur Stone},
  title = {A survey method for characterizing daily life experience: The day reconstruction method},
  abstract = {  },
  year = {2004},
  journal = {Science},
  volume = {306},
  number = {5702},
  pages = {1776{\textendash}1780},
  publisher = {American Association for the Advancement of Science},
  language = {eng},
}