I have use SEO off page task of Article submission and its a good technique of web site promotion but I want to ask a question about article that Can I do my web services advertise in my article ?
It is against the guidelines of some quality article submission site, you can promote your services, can not include URL and other, so trying to avoid it and get backlinks from about author field.
This does not go with the rules and regulations of article submission websites. But, you can promote the products and services you offer.
For better information read the guidelines of the article directory before submit your article.