(September 1, 2015, 1:51 PM EDT) -- PITTSBURGH — A landowner couple who alleges that a hydraulic fracturing company has violated the agreement under which they sold the company a mineral rights lease for oil and gas exploration filed a brief in Pennsylvania federal court on Aug. 31, seeking to remand the case to state court (Williams J. Gottselig Jr., et al. v Energy Corporation of America, No. 15-00971, W.D. Pa.)....