• Zabaljauregi, M. , Prieto, A., Navarro, P., Fernández, S., Villanueva, U., Etxeandia, J., Bartolomé, L.J., Cortazar, E., Delgado, A., Raposo, J.C., Arana, G., de Diego, A., Etxebarria, N., Fernández, L.A., Usobiaga, A., Zuloaga, O., Madariaga, J.M.  Monitorización de contaminantes químicos (orgánicos persistentes, organometálicos y metales) en sedimentos y ostras del estuario de Urdaibai I Encuentro Iberoamericano de Reservas de la Biosfera y Cátedras Unesco, Eusko Jaurlaritza, Gasteiz,  2006;  87 - 93 -  978-84-457-2515-3
• Antolín, R., Posada, T., Borge, G., Raposo, J.C., Arana, G., Etxebarria, N.  A methodology for analyzing se in Mn electrolytic metal and Al materials coming from the casthouse Light metals 2005, Halvor Kvande (eds.), TMS (The Minerals, Metals & Materials Society), Warrendale (USA),  2005;  969 - 972 -  0-87339-580-8
• Astibia, H., Payros, A., Pereda-Suberbiola, X., Elorza, J., Berreteaga, A., Etxebarria, N., Badiola, A., Tosquella, J.  Sedimentology and taphonomy of sirenian remains from the Middle Eocene of the Pamplona Basin (Navarre, western Pyrenees) Facies,  2005;  50(3-4),  463 - 475
• Baranda, A.B., Etxebarria, N., Jiménez, R.M., Alonso, R.M.  Improvement of the chromatographic separation of several 1,4-dihydropyridines calcium channel antagonist drugs by experimental design Journal of Chromatographic Science,  2005;  43(10),  505 - 512
• Bartolomé, L., Cortazar, E., Raposo, J.C., Usobiaga, A., Etxebarria, N., Zuloaga, O., Fernández, L.A.  Simultaneous microwave-assisted extraction of polycyclic aromatic hydrocarbons, polychlorinated biphenyls, phthalate esters and nonylphenols in sediments Journal of Chromatography A,  2005;  1068(2),  229 - 236
• Castro, K., Vandenabeele, P., Rodríguez-Laso, M.D., Moens, L., Madariaga, J.M.  Improvements in the wallpaper industry during the second half of the 19th century: Micro-Raman spectroscopy analysis of pigmented wallpapers Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy,  2005;  61(10),  2357 - 2363
• Cortazar, E., Bartolomé, L., Delgado, A., Etxebarria, N., Fernández, L.A., Usobiaga, A., Zuloaga, O.  Optimisation of microwave-assisted extraction for the determination of nonylphenols and phthalate esters in sediment samples and comparison with pressurised solvent extraction Analytica Chimica Acta,  2005;  534(2),  247 - 254
• Etxebarria, N., Antolín, R., Borge, G., Posada, T., Raposo, J.C.  Optimisation of flow-injection-hydride generation inductively coupled plasma spectrometric determination of selenium in electrolytic manganese Talanta,  2005;  65(5),  1209 - 1214
• Etxebarria, N., Arana, G., Antolín, R., Díez, E., Borge, G., Posada, T., Raposo, J.C.  Chromium powder as a reference material for the quality control of particle-size measurement by laser diffraction Powder Technology,  2005;  155(1),  85 - 91
• Amigo, J.M., Arana, G., Etxebarria, N., Fernández, L.Á.  Emerging needs for sustained production of laboratory reference materials TrAC Trends in Analytical Chemistry,  2004;  23(1),  80 - 85