Anisotropic fluid spheres admitting Karmarkar condition in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si8.svg"><mml:mrow><mml:mi>f</mml:mi><mml:mo>(</mml:mo><mml:mi mathvariant="script">G</mml:mi><mml:mo>,</mml:mo><mml:mi mathvariant="bold-script">T</mml:mi><mml:mo>)</mml:mo></mml:mrow></mml:math> gravity

G. Mustafa, M. Farasat Shamir, Mushtaq Ahmad, Asifa Ashraf