Is that dog a pit bull? A cross-country comparison of perceptions of shelter workers regarding breed identification.

This is an inter-observer reliability study, the primary goal of which was to determine the level of agreement between shelter workers in the U.S. & U.K. regarding dogs they labeled “pit bulls.”
Inconsistent identification of pit bull-type dogs by shelter staff.

This study explored two aspects of visual breed identification: consistency among experts and validity when compared to DNA analysis.
Comparison of visual and DNA breed identification of dogs and inter-observer reliability

This study examined both inter-rater reliability between experienced canine professionals and validity of visual breed identifications compared to DNA profiles—both were very low.
Comparison of adoption agency breed identification and DNA breed identification of dogs

This study compared adoption agencies’ visual breed identifications of 20 mixed-breed dogs against DNA analysis.
Dog-bite related fatalities: a 15 year review of Kentucky medical examiner cases

This paper covers a small retrospective study of 11 DBRFs in Kentucky between 1991-2005.
Human deaths induced by dog bites, United States, 1974-75

This paper reported on DBRFs for a two-year period (1974-1975) in the U.S.