Steffen, W.; Grinevald, J.; Crutzen, P.; McNeill, J. (2011). «The Anthropocene: conceptual and historical perspectives». Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences369 (1938): 842–867. doi:10.1098/rsta.2010.0327. ISSN1364-503X. PMID21282150. Bibcode: 2011RSPTA.369..842S.
Crutzen, Paul J. (Αύγουστος 2006). «Albedo enhancement by stratospheric sulfur injections: a contribution to resolve a policy dilemma?». Climatic Change77 (3-4): 211-219. doi:10.1007/s10584-006-9101-y. Bibcode: 2006ClCh...77..211C.
Steffen, W.; Grinevald, J.; Crutzen, P.; McNeill, J. (2011). «The Anthropocene: conceptual and historical perspectives». Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences369 (1938): 842–867. doi:10.1098/rsta.2010.0327. ISSN1364-503X. PMID21282150. Bibcode: 2011RSPTA.369..842S.
Crutzen, Paul J. (Αύγουστος 2006). «Albedo enhancement by stratospheric sulfur injections: a contribution to resolve a policy dilemma?». Climatic Change77 (3-4): 211-219. doi:10.1007/s10584-006-9101-y. Bibcode: 2006ClCh...77..211C.
Steffen, W.; Grinevald, J.; Crutzen, P.; McNeill, J. (2011). «The Anthropocene: conceptual and historical perspectives». Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences369 (1938): 842–867. doi:10.1098/rsta.2010.0327. ISSN1364-503X. PMID21282150. Bibcode: 2011RSPTA.369..842S.
Steffen, W.; Grinevald, J.; Crutzen, P.; McNeill, J. (2011). «The Anthropocene: conceptual and historical perspectives». Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences369 (1938): 842–867. doi:10.1098/rsta.2010.0327. ISSN1364-503X. PMID21282150. Bibcode: 2011RSPTA.369..842S.