Truhar, N. (1996). Perturbation of invariant subspaces. Mathematical Communications, 1. (1), 51-59. Preuzeto s https://urn.nsk.hr/urn:nbn:hr:133:950574
Truhar, Ninoslav. "Perturbation of invariant subspaces." Mathematical Communications, vol. 1, br. 1, 1996, str. 51-59. https://urn.nsk.hr/urn:nbn:hr:133:950574