richard-e-pfeiffer-md-facog-v-hartford-fire-insurance-company , 929 F.2d 1484 ( 1991 )
Burford v. Sun Oil Co. , 63 S. Ct. 1098 ( 1943 )
Government & Civic Employees Organizing Committee v. Windsor , 77 S. Ct. 838 ( 1957 )