In a paper on which I'm working, I needed a block quotation, within which there were hanging paragraphs — for each every line except for the first was indented — effected in a way that naturally complemented ordinary block quotations as defined in
article.cls. Not being a master of LAΤΕΧ, I made a search for how to do this, but I did not find anything that quite did the job. I arrived at this
which I am posting for the benefit of someone which the same problem, or with a problem sufficiently similar that my solution is readily adapted to his or to hers.
To use the code, place it in the LAΤΕΧ preamble, and then nest each block of paragraphs for which it is to be used between