A. Gheondea, S. Gudder: Sequential product of quantum effects, Proc. Amer. Math. Soc., 132(2004), 503-512.
P. Cojuhari, A. Gheondea, On lifting of operators to Hilbert spaces induced by positive selfadjoint operators, J. Math. Anal. Appl. 304 (2005), 584--598.
A.Gheondea, S. Gudder, P. Jonas, On the infimum of quantum effects. J. Math. Phys. 46 (2005), no. 6, 062102, 11 pp.
T. Constantinescu and A. Gheondea: On L. Schwartz's boundedness condition for kernels, Positivity, 10(2006), no. 1, 65-86.
T. Tudor and A. Gheondea: Pauli algebraic forms of normal and non-normal operators, J. Opt. Soc. Amer. A 24(2007), 204-210.
A. Gheondea: Comment on: ``A note on the infimum problem of Hilbert space effects'' [J. Math. Phys. 47 (2006), no. 10, 102103, 9 pp.] by L. Yuan and H. K. Du. J. Math. Phys. 48(2007), no. 11, 112109, 2 pp.
A. Gheondea, A.S. Kavruk: Absolute continuity of operator valued completely positive maps on C*-algebras, J. Math. Phys. 50(2008), no.2, 022102, 29 pag.
P. Cojuhari and A. Gheondea: Krein spaces induced by symmetric operators, J. Operator Theory, 61(2009), 347--367 .
A. Gheondea: When are the products of normal operators normal?, Bull. Math. Soc. Roum. Math., 52(2009), 129-150.
A. Gheondea and A.S. Kavruk: A note on Radon-Nikodym derivatives and similarity of completely bounded maps, Opuscula Mathematica, 29(2009), 139-145.
P. Cojuhari, A. Gheondea: Closed embeddings of Hilbert spaces. J. Math. Anal. Appl. 369(2010), 60-75.
A. Gheondea: The three equivalent forms of completely positive maps on matrices, Annals of the University of Bucharest (mathematical series), 1(59) (2010), 79-98.
P. Cojuhari, A. Gheondea: Closely embedded Krein spaces and applications to Dirac operators, J. Math. Anal. Appl. 376(2011), 540-550.
P. Cojuhari, A. Gheondea: Embeddings, operator ranges, and Dirac operators, Complex Analysis and Operator Theory 5(2011), 941-953.
A. Gheondea, B.E. Ugurcan: On two equivalent dilation theorems in VH-spaces, Complex Analysis and Operator Theory, 6(2012), 625-650.
A. Gheondea: Dilations of some VH-spaces operator valued invariant kernels, Integral Equations and Operator Theory, 74(2012), 451-479.
P. Cojuhari, A. Gheondea: Triplets of closely embedded Dirichlet type spaces on the unit polydisc, Complex Analysis and Operator Theory (accepted).