Table 2

Algorithm of citations-over-age index determination in either PubMed Central or Googleâ„¢ Scholar mode

Age


< = 1 year

>1 and < = 3 years

> 3 and < = 5 years

> 5 years


Forward Citations

No forward citations

1

1

0.75

0.5

Present forward citations

1+(0.4*n)

1+(0.2*n)

1+(0.1*n)

1+(0.1*n)


where n = number of forward citations

Plikus et al. BMC Bioinformatics 2006 7:424   doi:10.1186/1471-2105-7-424

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