[
C. Parameshwara Murthy (2008), [http://books.google.com.br/books?id=0xl17YU8WzQC&pg=PA217 "University Chemistry"], volume 1, 675 pages. New Age International. ISBN 8122407420. Quote: "''The only two interhalogen componds are IFCl2 an IF2Cl''" (no source given)
]
[
Balaram Sahoo, Nimai Charan Nayak, Asutosh Samantaray, Prafulla Kumar Pujapanda (2012), [http://books.google.com.br/books?id=QBkLQzaJXc4C&pg=PA534 "Inorganic Chemistry"]. PHI Learning Pvt. Ltd. ISBN 8120343085. Quote: "Only a few ternary interhalogen compounds such as {{chem|IFCl|2}} and {{chem|IF|2|Cl}} have been preprared." (no source given)
]
[
Robert A. Meyers, editor (2001), [http://www.sciencedirect.com/science/referenceworks/9780122274107 "Encyclopedia of Physical Science and Technology: Inorganic Chemistry"], third edition. Academic Press. ISBN 978-0-12-227410-7 Quote: "A few ternary compounds, such as IFCl2 and IF2Cl, are also known." (no source given)
]
[
Igor S. Ignatyev and Henry F. Schaefer III (1999), "Bromine Halides: The Neutral Molecules {{chem|BrClF|''n''}} (''n'' = 1-5) and Their Anions Structures, Energetics, and Electron Affinities". Journal of the American Chemical Society, volume 121, issue 29, pages 6904–6910. {{doi|10.1021/ja990144h}} Conclusion: maybe there are some barely stable compounds.
]