This will take some time...
Since I'm not familiar with the Serenade for Strings and also not with other works by Dvořák and last not with himself, I will have to read something about his oeuvre (concerning the question, how this Serenade for Strings is embedded in this oeuvre), and I will have to listen to this piece and to pieces from the compositional neighbourhood. Maybe I will take a look into the score, and as soon as I have a first impression or an opinion, I could furthermore go into some musicological literature about this piece. But first steps first...