The Wolverine [Articles] - IGN
X-Men: First Class [Articles] - IGN
Logan's X-Men Timeline
The Complete History of Wolverine in the 'X-Men' Movies, Including the Setup for 'Logan' (Photos) - TheWrap
Here's How 'Logan' Barely Fits in the X-Men Timeline
X2 - IGN
X-Men: First Class - IGN
Logan: Wolverine Fitting in X Men Timeline—Plot Summaries
X-Men: First Class - IGN
Which X-Men Timeline Does Logan Take Place In?