00309nam a2200121Ia 4500082002000000100001900020245004100039260002900080300000900109490005900118500000500177700000500182  a515.35bL338.SD  aLasalle, J. P.  aThe stability of dynamical systemsb  aPhiladelphiabSIAMc1976  a76p.  aRegional conference series in Applied Mathematicsv 25  a  a