Periodic and Fixed Points for Caristi-Type <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1"> <mi>G</mi> </math>-Contractions in Extended <math xmlns="http://www.w3.org/1998/Math/MathML" id="M2"> <mi>b</mi> </math>-Gauge Spaces
Journal of function spaces