Oil pastel (also called wax oil crayon) is a painting and drawing medium with characteristics similar to pastels and wax crayons. Unlike "soft" or "French" pastel sticks, which are ...
http://en.wikipedia.org/wiki/Oil_pastel

The Oil Pastel Society welcomes artists internationally to join in an effort to promote oil pastels as a fine art medium.
http://www.oilpastelsociety.com/

Oil Pastel is a relatively new medium, considering that most have been around for centuries. In 1921, assisted and advised by artist and theorist Yamamoto, 2 brothers ...
http://www.oilpastelsociety.com/history.htm

Jane Aukshunas, contemporary oil pastel. Vibrant color and sensuality of line give her work a playful and contemporary feeling.
http://www.janeaukshunas.com/

Information & tips on techniques of painting with oil pastels, from oil pastel artist Sarah Theophilus.
http://www.petsinpastel.com/oilpastels.htm