Closed formulas for the numbers of small independent sets and matchings and an extremal problem for trees.

Charles Delorme Odile Favaron Dieter Rautenbach Closed formulas for the numbers of small independent sets and matchings and an extremal problem for trees. 503-512 2003 130 Discrete Applied Mathematics 3 http://dx.doi.org/10.1016/S0166-218X(03)00328-7 db/journals/dam/dam130.html#DelormeFR03