Emoticon Style: Interpreting Differences in Emoticons Across Cultures
Smiley face: why we use emoticon stickers in mobile messaging
What does this Emoji Mean? A Vector Space Skip-Gram Model for Twitter Emojis
Happy, Nervous or Surprised? Classification of Human Affective States in Social Media
How do I communicate my emotions on SNS and IMs?
iFeel: a system that compares and combines sentiment analysis methods