Newspaper articles are protected by copyright. Whether you need the consent of the copyright owner depends on what you mean by "use" of the article. 

If, in your publicity, you merely refer to the fact that the newspaper featured your company, you do not need the newspaper's permission to do so.  

If you wish to link to an online version of the feature, you should check the website's terms and conditions on use and linking before doing so.

If you intend to reproduce the newspaper feature in your publicity material, you will need the copyright owner's consent to do so.

The copyright owner may be the newspaper itself, or the feature writer, especially if he/she is a freelancer. You should start by checking with the newspaper.