Coupled Fixed Point Theorems for Some Type of Contraction Mappings in <math xmlns="http://www.w3.org/1998/Math/MathML" id="M1"> <mi>b</mi> </math>-Cone and <math xmlns="http://www.w3.org/1998/Math/MathML" id="M2"> <mi>b</mi> </math>-Theta Cone Metric Spaces
Journal of mathematics