DOC Add reference for lbfgs in LogisticRegression
@@ -1410,6 +1410,10 @@ class LogisticRegression(BaseEstimator, LinearClassifierMixin,
References
----------
+ L-BFGS-B -- Software for Large-scale Bound-constrained Optimization
+ Ciyou Zhu, Richard Byrd, Jorge Nocedal and Jose Luis Morales.
+ http://users.iems.northwestern.edu/~nocedal/lbfgsb.html
+
LIBLINEAR -- A Library for Large Linear Classification
https://www.csie.ntu.edu.tw/~cjlin/liblinear/
