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The Journal of Chemical Physics|August 12, 2004
Polarization consistent basis sets. V. The elements Si-ClFrank Jensen, Trygve HelgakerThe Journal of Chemical Physics|August 10, 2013
The accuracy of the Gaussian-and-finite-element-Coulomb (GFC) method for the calculation of Coulomb integralsMichal Przybytek, Trygve HelgakerJournal of Computational Chemistry|May 16, 2002
Four-component relativistic Kohn-Sham theoryTrond Saue, Trygve HelgakerJournal of Chemical Theory and Computation|December 3, 2015
Density-Functional and Coupled-Cluster Singles-and-Doubles Calculations of the Nuclear Shielding and Indirect Nuclear Spin-Spin Coupling Constants of o-BenzyneTrygve Helgaker, Michał JaszuńskiThe Journal of Chemical Physics|November 17, 2015
Ground-state densities from the Rayleigh-Ritz variation principle and from density-functional theorySimen Kvaal, Trygve HelgakerThe Journal of Physical Chemistry. A|September 18, 2014
Use of density functional theory orbitals in the GVVPT2 variant of second-order multistate multireference perturbation theoryMark R Hoffmann, Trygve HelgakerPhysical Chemistry Chemical Physics : PCCP|February 17, 2006
Assessment of a Coulomb-attenuated exchange-correlation energy functionalMichael J G Peach, Trygve Helgaker, Paweł Sałek, et al.The Journal of Organic Chemistry|November 2, 2016
Calculation of NMR Spin-Spin Coupling Constants in StrychnineTrygve Helgaker, Michał Jaszuński, Paweł ŚwiderThe Journal of Chemical Physics|July 23, 2004
Density-functional theory calculations of optical rotatory dispersion in the nonresonant and resonant frequency regionsPatrick Norman, Kenneth Ruud, Trygve HelgakerEuropean Journal of Mass Spectrometry (Chichester, England)|November 9, 2004
Models of fragmentations induced by electron attachment to protonated peptidesVebjørn Bakken, Trygve Helgaker, Einar UggerudPageof 18