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

@Article{Helm1974,
 author = {Helms, Don R.},
 year  = {1974},
 title = {Age and Growth of Shovelnose Sturgeon, \emph{Scaphirhynchus platorynchus} ({R}afinesque), in the {M}ississippi {R}iver},
 journal = {Proceedings of the Iowa Academy of Science},
 volume = {81},
 number = {2},
 howpublished = {\url{https://scholarworks.uni.edu/pias/vol81/iss2/10}},
pages = {73-75}
} 

@Misc{fishbase,
 howpublished = {\url{https://www.fishbase.se/summary/Scaphirhynchus-platorynchus.html}}
} 

@Misc{ADW,
 howpublished = {\url{https://animaldiversity.org/accounts/Scaphirhynchus_platorynchus/}}
}