| Nuevo catálogo de la flora vascular de Venezuela O Hokche, PE Berry, O Huber Fundación Instituto Botánico de Venezuela 1, 859-859, 2008 | 428 | 2008 |
| A land cover map of South America HD Eva, AS Belward, EE De Miranda, CM Di Bella, V Gond, O Huber, ... Global Change Biology 10 (5), 731-744, 2004 | 402 | 2004 |
| Geographical and physical features O Huber Flora of the venezuelan Guayana 1, 1-61, 1995 | 370 | 1995 |
| Mapa de vegetación de Venezuela O Huber República de Venezuela, Ministerio del Ambiente y de los Recursos Naturales …, 1988 | 341 | 1988 |
| Contribution to the herpetofauna of the Venezuelan Guayana. S Gorzula, B Otto Huber, JC Señaris, O Huber O. Huber, 1998 | 233 | 1998 |
| Flora of Avila. JA Steyermark, O Huber | 195 | 1978 |
| Libro rojo de la flora venezolana S Llamozas, R Duno de Stefano, W Meier, R Riina, G Aymard, O Huber, ... | 161 | 2003 |
| A vegetation map of South America HD Eva, EE De Miranda, CM Di Bella, V Gond, O Huber, M Sgrenzaroli, ... European Commission, 2002 | 146 | 2002 |
| Guayana highlands versus Guayana lowlands, a reappraisal O Huber Taxon 37 (3), 595-614, 1988 | 131 | 1988 |
| A proposal for defining the geographical boundaries of Amazonia; synthesis of the results from an expert consultation workshop organized by the European Commission in … HD Eva, O Huber, F Achard, H Balslev, S Beck, H Behling, AS Belward, ... European Commission, 2005 | 119 | 2005 |
| Estado actual del conocimiento de la flora en Venezuela O Huber Ministerio del Ambiente y de los Recursos Naturales Renovables, 1998 | 117 | 1998 |
| The plants of Sudan and South Sudan: an annotated checklist. I Darbyshire, M Kordofani, I Farag, R Candiga, H Pickering Royal Botanic Gardens, Kew, 2015 | 111 | 2015 |
| Vegetación de la cuenca del río Caroní O Huber Interciencia, 1986 | 110 | 1986 |
| Glosario fitoecológico de las Américas O Huber, R Riina | 103* | 1997 |
| Neotropical savannas: their flora and vegetation O Huber Trends in Ecology & Evolution 2 (3), 67-71, 1987 | 101 | 1987 |
| Mapa de vegetación de Venezuela 1: 2.000. 000 O Huber, C Alarcon Ministerio del Ambiente y de los Recursos Naturales Renovables, 1988 | 100 | 1988 |
| Recent advances in the phytogeography of the Guayana region, South America O Huber Mém. Soc. Biogéogr 4, 53-63, 1994 | 99 | 1994 |
| Catálogo anotado e ilustrado de la flora vascular de los Llanos de Venezuela RD de Stefano, G Aymard, O Huber, E ESTÉVEZ, G ORSINI, ... Fudena, 2007 | 98 | 2007 |
| Herbaceous ecosystems on the Guayana Shield, a regional overview O Huber Journal of Biogeography 33 (3), 464-475, 2006 | 98 | 2006 |
| Conservation of the Venezuelan Guayana O Huber Flora of the Venezuelan guayana 1, 193-218, 1995 | 97 | 1995 |
