| Nuevo catálogo de la flora vascular de Venezuela O Hokche Fundación Instituto Botánico de Venezuela Dr. Tobías Lasser, 2008 | 408 | 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 | 399 | 2004 |
| Geographical and physical features O Huber Flora of the venezuelan Guayana 1, 1-61, 1995 | 356 | 1995 |
| Mapa de vegetación de Venezuela O Huber República de Venezuela, Ministerio del Ambiente y de los Recursos Naturales …, 1988 | 340 | 1988 |
| Contribution to the herpetofauna of the Venezuelan Guayana. S Gorzula, B Otto Huber, JC Señaris, O Huber O. Huber, 1998 | 225 | 1998 |
| Flora of Avila. JA Steyermark, O Huber | 189 | 1978 |
| Libro rojo de la flora venezolana S Llamozas, R Duno de Stefano, W Meier, R Riina, G Aymard, O Huber, ... | 158 | 2003 |
| A vegetation map of South America HD Eva, EE De Miranda, CM Di Bella, V Gond, O Huber, M Sgrenzaroli, ... European Commission, 2002 | 140 | 2002 |
| Guayana highlands versus Guayana lowlands, a reappraisal O Huber Taxon 37 (3), 595-614, 1988 | 123 | 1988 |
| Estado actual del conocimiento de la flora en Venezuela O Huber Ministerio del Ambiente y de los Recursos Naturales Renovables, Estrategia …, 1998 | 118 | 1998 |
| 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 | 109 | 2005 |
| Vegetación de la cuenca del río Caroní O Huber Interciencia, 1986 | 108 | 1986 |
| Mapa de vegetación de Venezuela 1: 2.000. 000 O Huber, C Alarcon Ministerio del Ambiente y de los Recursos Naturales Renovables, 1988 | 105 | 1988 |
| Neotropical savannas: their flora and vegetation O Huber Trends in Ecology & Evolution 2 (3), 67-71, 1987 | 98 | 1987 |
| Glosario fitoecológico de las Américas, v. 2: México, América Central e Islas del Caribe: países hispanoparlantes O Huber, R Riina UNESCO: United Nations Educational, Scientific and Cultural Organisation, 2003 | 97* | 2003 |
| Recent advances in the phytogeography of the Guayana region, South America O Huber Mém. Soc. Biogéogr 4, 53-63, 1994 | 94 | 1994 |
| Catálogo anotado e ilustrado de la flora vascular de los Llanos de Venezuela RD de Stefano, G Aymard, O Huber Fudena, 2007 | 93 | 2007 |
| Herbaceous ecosystems on the Guayana Shield, a regional overview O Huber Journal of Biogeography 33 (3), 464-475, 2006 | 90 | 2006 |
| Conservation of the Venezuelan Guayana O Huber Flora of the Venezuelan guayana 1, 193-218, 1995 | 89 | 1995 |
| Significance of savanna vegetation in the Amazon Territory of Venezuela O Huber Biological diversification in the tropics, 221-244, 1982 | 86 | 1982 |
