author: Hany M Elsheikha  Mohamed A Helal  Alison A Morrison  Gareth W V Cave 

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copyrighted in Argentina.

copyrighted in Trinidad and Tobago.

copyrighted in Saint Vincent and the Grenadines.

copyrighted in United States.

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copyrighted in Ireland.

copyrighted in Dominica.

copyrighted in Chinland.

copyrighted in Philippines.

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copyrighted in The Gambia.

copyrighted in countries which use the rule of the shorter term.

copyrighted in Brunei.

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copyrighted in countries with 70 years copyright term after publication.

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copyrighted in Bangladesh.

copyrighted in South Sudan.

copyrighted in countries with longer than 50 years pma.

copyrighted in Lebanon.

copyrighted in State of Palestine.

copyrighted in Kingdom of Denmark.

copyrighted in Mauritania.

copyrighted in Iran.

copyrighted in Tanzania.

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copyrighted in Democratic Republic of the Congo.

copyrighted in Rwanda.

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copyrighted in countries with 50 years copyright term after publication.

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copyrighted in countries with longer than 60 years pma.

copyrighted in countries with longer than 80 years pma.

copyrighted in countries with longer than 85 years pma.

copyrighted in countries with 71.5 years copyright term after publication.

copyrighted in countries with 25 years pma.

copyrighted in countries with 45 years pma or shorter.

copyrighted in countries with 74 years copyright term after publication.

copyrighted in countries with 25 years copyright term after publication.

copyrighted in countries with 95 years copyright term after publication.

copyrighted in countries with 75 years pma.

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copyrighted in countries with 85 years pma.

copyrighted in countries with longer than 74 years pma.

copyrighted in countries with 78 years pma or shorter.

copyrighted in countries with 50 years pma.

copyrighted in countries with 90 years pma.

copyrighted in countries with longer than 90 years pma.

copyrighted in countries with longer than 100 years pma.

copyrighted in countries with 15 years pma.

copyrighted in countries with 45 years pma.

copyrighted in countries with 85 years pma or shorter.

copyrighted in countries with 15 years pma or shorter.

copyrighted in countries with longer than 15 years pma.

copyrighted in countries with longer than 45 years pma.

copyrighted in countries with longer than 95 years pma.

copyrighted in countries with 74 years pma or shorter.

copyrighted in countries with 80 years pma.

copyrighted in countries with 60 years pma.

copyrighted in countries with 74 years pma.

copyrighted in countries with 100 years pma.

copyrighted in countries with 78 years pma.

copyrighted in countries with 95 years pma.