A selfie is a type of self-portrait photograph, typically taken with a hand-held digital camera or camera phone. In August 2013, the term selfie also made its debut in Oxford Dictionaries Online's quarterly update where it is defined as "a photograph that one has taken of oneself, typically one taken with a smartphone or webcam and uploaded to a social media website.

The Selfie Assemblage
What does your selfie say about you?
Selfie posting behaviors are associated with narcissism among men
What does the selfie say? Investigating a global phenomenon
Selfie Numbers: Consecutive Representations in Increasing and Decreasing Orders
Art at Arm's Length: A History of the Selfie
Do age and gender differences exist in selfie-related behaviours?
Terrorising the self: Selfie culture at the intersection of the corporate and surveillance state
#Me: Narcissism and its facets as predictors of selfie-posting frequency
Crazy Representations of Natural Numbers, Selfie Numbers, Fibonacci Sequence, and Selfie Fractions