Alexander Farrugia. “Graphs Having Most of Their Eigenvalues Shared by a Vertex Deleted Subgraph” Symmetry, Special Issue Symmetry, Graph Reconstruction and Molecular Conduction, 13(9) (2021), 1663.
Irene Sciriha and Alexander Farrugia. From Nut Graphs to Molecular Structure and Conductivity; Mathematical Chemistry Monographs, University of Kragujevac: Kragujevac, Serbia, 2021.
Alexander Farrugia. “The rank of Pseudo walk matrices: controllable and
recalcitrant pairs” Open Journal of Discrete Applied Mathematics, 3(3) (2020), 41-52.
“Controllability of NEPSes of graphs” Linear and Multilinear Algebra (2020). DOI: 10.1080/03081087.2020.1778622.
Alexander Farrugia. “Spectral graph theory : from practice to theory” Symposia Melitensia, 16 (2020), 109-118.
Alexander Farrugia. “Edge Construction of Molecular NSSDs” Discrete Applied Mathematics, 266 (2019), 130-140.
Alexander Farrugia. “The Overgraphs of Generalized Cospectral Controllable Graphs” The Electronic Journal of Combinatorics, 26(1) (2019), P1.14.
Alexander Farrugia. “On Pseudo Walk Matrices” Discrete Mathematics Letters 1 (2019), 8-15.
Alexander Farrugia. “Combinatory Logic: From Philosophy and Mathematics to Computer Science”. In Proceedings of the ‘Breaking Barriers’ conference held at the University of Malta Junior College, 2018. Available at https://www.um.edu.mt/library/oar/handle/123456789/38118.
Alexander Farrugia. “The Connections of Connections: New Results on the Centrality and Communicability of Networks” Symposia Melitensia, 14 (2018), 257-269.
Alexander Farrugia. “The Increase in the Resolvent Energy of a Graph due to the Addition of a New Edge” Applied Mathematics and Computation, 321 (2018), 25-36.
Alexander Farrugia and Irene Sciriha. “Triangles in Inverse NSSD Graphs” Linear and Multilinear Algebra, 66(3) (2018), 540-546.
Alexander Farrugia. “Coulson-type Integral Formulae for the Energy Changes of Graph Perturbations” MATCH Communications in Mathematical and in Computer Chemistry, 77 (2017), 575-588.
Ivan Gutman, Boris Furtula, Alexander Farrugia and Irene Sciriha. “Constructing NSSD Molecular Graphs” Croatica Chemica Acta, 89(4) (2016), 449-454.
Irene Sciriha and Alexander Farrugia. “No Chemical Graph on more than two vertices is Nuciferous” Ars Mathematica Contemporanea, 11(2) (2016), 397-402.
Alexander Farrugia. “On Strongly Asymmetric and Controllable Primitive Graphs” Discrete Applied Mathematics, 211 (2016), 58-67.
Alexander Farrugia, John Baptist Gauci and Irene Sciriha. “Complete Graphs With Zero Diagonal Inverse” Ars Mathematica Contemporanea (Mathematical Chemistry Issue – In Memory of Ante Graovac), 11(2), (2016), 231-245.
Alexander Farrugia and Irene Sciriha. “On the Main Eigenvalues of Universal Adjacency Matrices and U-Controllable Graphs” Electronic Journal of Linear Algebra, 30 (2015), 812-826.
Alexander Farrugia, John Baptist Gauci and Irene Sciriha. “Non-Singular Graphs With a Singular Deck” Discrete Applied Mathematics, 202 (2015), 50-57.
Alexander Farrugia and Irene Sciriha. “Controllability of Undirected Graphs” Linear Algebra and its Applications, 454 (2014), 138-157.
Irene Sciriha, Alexander Farrugia and John Baptist Gauci. “The Adjacency Matrices of Complete and Nutful Graphs” MATCH Communications in Mathematical and in Computer Chemistry, 72 (2014), 165-178.
Alexander Farrugia and Irene Sciriha. “The Main Eigenvalues and Number of Walks in Self-Complementary Graphs” Linear and Multilinear Algebra, 62(10) (2014), 1346-1360.
Alexander Farrugia, John Baptist Gauci and Irene Sciriha. “On the Inverse of the Adjacency Matrix of a Graph” Special Matrices, 1 (2013), 28-41 (most downloaded paper of Special Matrices journal as of February 2018)
Alexander Farrugia 