Abramov A; Belant J. & Wozencraft C. (2009). "
Gulo gulo".
IUCN Red List of Threatened Species.
Version 2009.2.
International Union for Conservation of Nature.
Retrieved 2010-01-25.

Knudson, Tom (5 April 2008). "
Sighting prompts California to expand search for elusive wolverine".
Sacramento Bee.
Archived from the original on 30 July 2013.

Griffith, Martin (22 March 2009). "
A year later, wolverine spotted again in Sierra".
San Francisco Chronicle.

Wolverine Sighting on SPI Land near Truckee 18 Mar 2009
Runk, David. (
2004-02-25) First Michigan wolverine spotted in 200 years – Technology & science – Science – msnbc.com.
MSNBC.
Retrieved on 2011-09-16.

"Wolverines".
Montana Department of Fish, Wildlife and Parks.
fwp.mt.gov.

U.S. proposes to protect wolverines February 1, 2013 New York Times
Judge Prods Wildlife Service on Protection for Wolverines April 7, 2016
Abramov A; Belant J. & Wozencraft C. (2009). "Gulo gulo". IUCN Red List of Threatened Species. Version 2009.2. International Union for Conservation of Nature. Retrieved 2010-01-25.
Knudson, Tom (5 April 2008). "Sighting prompts California to expand search for elusive wolverine". Sacramento Bee. Archived from the original on 30 July 2013.
Griffith, Martin (22 March 2009). "A year later, wolverine spotted again in Sierra". San Francisco Chronicle.
Wolverine Sighting on SPI Land near Truckee 18 Mar 2009
Runk, David. (2004-02-25) First Michigan wolverine spotted in 200 years – Technology & science – Science – msnbc.com. MSNBC. Retrieved on 2011-09-16.
"Wolverines". Montana Department of Fish, Wildlife and Parks. fwp.mt.gov.
U.S. proposes to protect wolverines February 1, 2013 New York Times
Judge Prods Wildlife Service on Protection for Wolverines April 7, 2016
Wolverine