Forming the Global Stiffness Matrix for planar trusses can be challenging, prompting a request for online resources. A recommended resource is "A First Course in the Finite Element Method" by Logan, which provides a clear explanation and worked examples of the plane truss problem. Additionally, Moaveni's book on finite element analysis includes examples relevant for using ANSYS, although it is noted to be less effective for learning. These texts are valuable for understanding the concepts and practical applications of FEA in truss analysis. Utilizing these resources can enhance comprehension and application of the Global Stiffness Matrix in planar trusses.