  In a recent article, Faraoni proposed an alternative procedure to solve the
Friedman-Lemaitre-Robertson-Walker (FLRW) cosmological equations. The basic
result of that paper was obtained long ago through a different approach, which
seems to be little known and deserves closer attention due to its pedagogical
interest. The broad importance of this method is readily recognized by
examining some additional cases not considered by Faraoni. Its instructive
potential for introductory courses on cosmology has been positively verified by
the author in many lectures during the last decade.
