The phrase "further investigation" means to look into something more closely or deeply in order to find additional information or answers. Full definition
The genome data will be used as the basis for further investigation of physiological adaptation strategies in different environmental conditions. (sciencedaily.com)
The literature related with any subject structures an establishment for further investigation of the issues identified with it. (essaycaptains.com)
Often this information can serve as an excellent starting point for further investigations into how well individual insurers manage their finances. (articles.onlineautoinsurance.com)