Click on the following links. Please note these will open in a new window.

http://hbswk.hbs.edu/topics/communication.html 
Harvard Business School
Working Knowledge website links articles of various business topics including Leadership & Management: Communication.

http://www.managementstudyguide.com/managerial-communication-articles.htm 
Management Study Guide
Articles on managerial communication.

http://www.gordontraining.com/free-workplace-articles/active-listening/
This site offers management and coaching tools along with personal development tools.