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.

**Accepted papers**

P.
Cojuhari, A. Gheondea: Triplets
of closely embedded Dirichlet type spaces on the unit polydisc,
*Complex
Analysis and Operator Theory* (accepted).