Try to fill out the gap with info searched for in other sources.
Having developed an in-depth plan, you will not only spend less time collecting material but also will be able to qualitatively complete this work.
Apart from the number of sources, a literature review plan should reflect the following criteria: To write a good literature review, it is important to decide on your plan of action.
As a piece of writing, the literature review must be defined by a guiding concept (e.g., your research objective, the problem or issue you are discussing, or your argumentative thesis).
Working on a dissertation or any other writing assignment is not only about finding useful sources; it is a complex and tiring process.