Research papers
Most current research papers on speech can be found online.
Google Scholar is a useful place that links out to many other sites.
Internet Archive Scholar section can also be used to search for papers.
Arxiv has an entire subsection for computer research, and the papers are linked from the abstract page in available formats.
Conference pages are also a good place to find new and interesting papers you might otherwise miss, finding a title on interspeech's presentations and searching for it on arxiv usually nets you a copy to read.