On (<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mi>h</mml:mi><mml:mo>,</mml:mo><mml:mi>k</mml:mi></mml:math>)-Dichotomies for Nonautonomous Linear Difference Equations in Banach Spaces
International journal of differential equations