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Bartels-Jónsdóttir HB, Voelker AHL, Abrantes F, Salgueiro E, Rodrigues T, Knudsen KLuise. High-frequency surface water changes in the Tagus prodelta off Lisbon, eastern North Atlantic, during the last two millennia. Marine Micropaleontology. 2015;117:13 - 24. doi:10.1016/j.marmicro.2015.03.001

Voelker AHL, de Abreu L, Schönfeld J, Erlenkeuser H, Abrantes F. Hydrographic conditions along the western Iberian margin during marine isotope stage 2. Geochemistry, Geophysics, Geosystems. 2009;10(12):n/a - n/a. doi:10.1029/2009GC002605