| Phylogenetic and biogeographic implications of chloroplast DNA variation in Picea A Sigurgeirsson, AE Szmidt Nordic Journal of Botany 13 (3), 233-246, 1993 | 89 | 1993 |
| Classifying seedlots of Picea sitchensis and P. glauca in zones of introgression using restriction analysis of chloroplast DNA AE Szmidt, YA El-Kassaby, A Sigurgeirsson, T Alden, D Lindgren, ... Theoretical and Applied Genetics 76, 841-845, 1988 | 86 | 1988 |
| Survival, growth, and nutrition of tree seedlings fertilized at planting on Andisol soils in Iceland: Six-year results H Óskarsson, A Sigurgeirsson, K Raulund-Rasmussen Forest Ecology and Management 229 (1-3), 88-97, 2006 | 79 | 2006 |
| Morphological Variation among Betula nana (diploid), B. pubescens (tetraploid) and their Triploid Hybrids in Iceland ÆT Thórsson, S Pálsson, A Sigurgeirsson, K Anamthawat-Jónsson Annals of botany 99 (6), 1183-1193, 2007 | 65 | 2007 |
| Differentiating pollen of Betula species from Iceland L Karlsdóttir, ÆT Thórsson, M Hallsdóttir, A Sigurgeirsson, T Eysteinsson, ... Grana 46 (2), 78-84, 2007 | 40 | 2007 |
| Fertilization in Icelandic afforestation: evaluation of results H Óskarsson, A Sigurgeirsson Scandinavian Journal of Forest Research 16 (6), 536-540, 2001 | 35 | 2001 |
| DNA fingerprinting of Populus trichocarpa clones using RAPD markers V Sigurdsson, K Anamthawat-Jónsson, A Sigurgeirsson New Forests 10, 197-206, 1995 | 27 | 1995 |
| Stafafura á Íslandi. Vöxtur, ástand og möguleikar A Sigurgeirsson EFNI, 3, 1988 | 21 | 1988 |
| Genetic relationships among Pinus species based on chloroplast DNA polymorphism. AE Szmidt, A Sigurgeirsson, XR Wang, JE Haellgren, D Lindgren Rapport-Sveriges Lantbruksuniversitet, 1988 | 21 | 1988 |
| The use of restriction analysis of chloroplast DNA in classifying hybrid spruce seedlots YA El-Kassaby, A Sigurgeirsson, AE Szmidt Rapport-Sveriges Lantbruksuniversitet, Institutionen foer Skoglig Genetik …, 1988 | 16 | 1988 |
| Facilitation of afforestation by Lupinus nootkatensis and by black plastic mulch in south-west Iceland DA Riege, A Sigurgeirsson Scandinavian journal of forest research 24 (5), 384-393, 2009 | 15 | 2009 |
| Alaskan Picea sitchensis populations infiltrated with Picea glauca genes: a study using DNA markers A Sigurgeirsson, AE Szmidt, B Karpinska Biochemical markers in the population genetics of forest trees, 197-207, 1991 | 15 | 1991 |
| Insights into the evolution of Picea inferred from chloroplast DNA. A Sigurgeirsson | 12 | 1994 |
| Genetic differentiation of the green spruce aphid (Elatobium abietinum Walker), a recent invader to Iceland. V Sigurdsson, G Halldórsson, A Sigurgeirsson, ÆT Thorsson, ... Agricultural and Forest Entomology 1 (3), 157-163, 1999 | 11 | 1999 |
| Chloroplast DNA variation among North-American Picea species, and its phylogenetic implications A Sigurgeirsson, A Szmidt Rapport-Sveriges Lantbruksuniversitet, Institutionen foer Skoglig Genetik …, 1988 | 11 | 1988 |
| A chloroplast DNA story about Asiatic pines XR Wang, AE Szmidt, A Sigurgeirsson, B Karpinska Biochemical markers in the population genetics of forest trees, 209-216, 1991 | 9 | 1991 |
| Direct seeding of boreal conifers on freely drained andosols in Southern Iceland JG Pétursson, A Sigurgeirsson Icelandic Agricultural Sciences 16 (17), 15-28, 2004 | 8 | 2004 |
| Líkleg þróun veðurfars á Íslandi með tilliti til ræktunar H Ólafsson, Á Helgadóttir, A Sigurgeirsson, J Hermannsson, ... Fræð* aþing Landbúnað* arins 4, 29, 2007 | 7 | 2007 |
| Provenance variability in establishment of native downy birch in a 14-year trial in southwest Iceland DA Riege, A Sigurgeirsson Agricultural University of Iceland, 2018 | 6 | 2018 |
| Effects of fertilization on tree seedling establishment and growth in a lupin field in southern Iceland. H Oskarsson, A Sigurgeirsson | 6 | 2004 |
