  A set $A$ of nonnegative integers is an asymptotic basis of order $h$ if
every sufficiently large integer can be represented as the sum of $h$ integers
(not necessarily distinct) of $A$. An asymptotic basis $A$ of order $h$ is
minimal if no proper subset of $A$ is an asymptotic basis of order $h$. In this
paper, we resolve a problem of Nathanson on minimal asymptotic bases of order
$h$.
