00365nam a2200121Ia 4500082002000000100001800020245008900038260003500127300001900162490005200181500000500233700000500238  a515.35bB974.SP  aBurton, T. A.  aStability and periodic solutions of ordinary and functional differential equationsb  aNew YorkbAcademic Pressc1985  ax, 337p. Index  aMathematics in Science and Engineeringv v. 178  a  a