Online Business or internet now has a very wide scope- from Digital Marketing to IoT, and everything in between. If you’re able to narrow your scope and define which particular aspect of online business you‘re interested in, then you may find a lot of information available.

• We can see an increase in O2O marketing (online to offline and vice versa). Increasingly customers do online search and offline purchase. Thus , though online (social media penetration) is increasing, the impact of different elements driving consumer behaviour is different in different economies.Consumers today have more choices than ever and more ways to make those choices. If your business stands any chance of staying competitive and remaining top of mind with consumers, then understanding customer engagement is a must.
• On an average, global internet users spend some 135 minutes per day surfing social networks. This prompts worldwide brands and their marketers to use that time and screen space to promote various products and services via social media marketing or social advertising

Publications on online businesses? Are you referring to online Journals? Most current research are online and most journals can be accessed directly online. If you can clarify it will be helpful