Examples of "pdfs"
http://www.goldfields.co.za/pdfs/technical_short_forms_2011/kdc_mine.pdf
http://www.childbirthconnection.org/pdfs/LTMII_report.pdf
http://www.globlx.com/pdfs/DEJ_1109%20Formatted.pdf
http://collections2.eeb.uconn.edu/nicroweb/PDFs/Sikes_et_al_2002.pdf
http://collections2.eeb.uconn.edu/nicroweb/PDFs/Sikes_et_al_2002.pdf
http://collections2.eeb.uconn.edu/nicroweb/PDFs/Sikes_et_al_2002.pdf
http://collections2.eeb.uconn.edu/nicroweb/PDFs/Sikes_et_al_2002.pdf
http://collections2.eeb.uconn.edu/nicroweb/PDFs/Sikes_et_al_2002.pdf
http://collections2.eeb.uconn.edu/nicroweb/PDFs/Sikes_et_al_2002.pdf
http://collections2.eeb.uconn.edu/nicroweb/PDFs/Sikes_et_al_2002.pdf
http://collections2.eeb.uconn.edu/nicroweb/PDFs/Sikes_et_al_2002.pdf
http://collections2.eeb.uconn.edu/nicroweb/PDFs/Sikes_et_al_2002.pdf
http://collections2.eeb.uconn.edu/nicroweb/PDFs/Sikes_et_al_2002.pdf
http://collections2.eeb.uconn.edu/nicroweb/PDFs/Sikes_et_al_2002.pdf
http://collections2.eeb.uconn.edu/nicroweb/PDFs/Sikes_et_al_2002.pdf
http://collections2.eeb.uconn.edu/nicroweb/PDFs/Sikes_et_al_2002.pdf
where formula_21 are the pdfs of the Inverse-Gamma distributions and formula_22 are the pdfs of the Gamma distributions, formula_23 is Gamma("α", "β") distributed.
http://collections2.eeb.uconn.edu/nicroweb/PDFs/Sikes_et_al_2002.pdf