Finding and sharing a common vocabulary is a critical task for the development of any area of knowledge. However, it is very common to find heated debate in the literature on the meaning of particular terms. Different authors propose different definitions, some of them even contradictory. This situation, while enriching the scientific process, may hinder the understanding of fundamental concepts regarding a certain subject. To address this problem, we propose a technique called References-enriched Concept Maps (RCM), inspired by concept maps. RCM can be used to compare definitions and therefore improve the understanding of terms, keeping track of the publications in which the different definitions were proposed. We present a method of RCM construction as well as different metrics for analysing them. An analysis carried out using the proposed metrics allows one to find answers while also raising new questions about the discussed concepts.