@Misc{Wiki,
 howpublished = {\url{http://en.wikipedia.org/wiki/Erethizon_dorsatum}}
} 

@Book{Kooy2010,
 author = {Kooijman, S.A.L.M.},
 year = {2010},
 title  = {Dynamic Energy Budget theory for metabolic organisation},
 publisher = {Cambridge Univ. Press, Cambridge},
 pages = {Table 4.2 (page 150), 8.1 (page 300)},
 howpublished = {\url{../../../bib/Kooy2010.html}}
} 

@Article{ShadPlos1943,
 doi = {10.2307/1374741},
 author = {Shadle, A. R. and Ploss, W. R.},
 year = {1943},
 title = {An Unusual Porcupine Parturition and Development of the Young},
 journal = {Journal of Mammalogy},
 volume = {24(4)},
 pages = {492-496}
} 

@Misc{AnAge,
 howpublished = {\url{http://genomics.senescence.info/species/entry.php?species=Erethizon_dorsatus}}
}