@article{heppell_sullivan_2000, title={Identification of gender and reproductive maturity in the absence of gonads: muscle tissue levels of sex steroids and vitellogenin in gag (Mycteroperca microlepis)}, volume={57}, DOI={10.1139/f99-188}, number={1}, journal={Canadian Journal of Fisheries and Aquatic Sciences}, author={Heppell, S. A. and Sullivan, C. V.}, year={2000}, pages={148–159} }
 @article{heppell_jackson_weber_sullivan_1999, title={Enzyme-Linked Immunosorbent Assay (ELISA) of vitellogenin in temperate basses (Genus morone): Plasma and in vitro analyses}, volume={128}, DOI={10.1577/1548-8659(1999)128<0532:ELIAEO>2.0.CO;2}, number={3}, journal={Transactions of the American Fisheries Society}, author={Heppell, S. A. and Jackson, L. F. and Weber, G. M. and Sullivan, C. V.}, year={1999}, pages={532–541} }
 @article{parks_cheek_denslow_heppell_mclachlan_leblanc_sullivan_1999, title={Fathead minnow (Pimephales promelas) vitellogenin: purification, characterization and qantitative immunoassay for the detection of estrogenic compounds}, volume={123C}, DOI={10.1016/s0742-8413(99)00010-9}, number={2}, journal={Comparative Biochemistry and Physiology. C, Pharmacology, Toxicology and Endocrinology}, author={Parks, L. G. and Cheek, A. O. and Denslow, N. D. and Heppell, S. A. and McLachlan, J. A. and LeBlanc, Gerald and Sullivan, C. V.}, year={1999}, pages={113–125} }
 @article{heppell_sullivan_1999, title={Gag (Mycteroperca microlepis) vitellogenin: purification, characterization and use for enzyme-linked immunosorbent assay (ELISA) of female maturity in three species of grouper}, volume={20}, DOI={10.1023/A:1007730816797}, number={4}, journal={Fish Physiology and Biochemistry}, author={Heppell, S. A. and Sullivan, C. V.}, year={1999}, pages={361–374} }
 @article{heppell_walters_crowder_1994, title={Evaluating management alternatives for red-cockaded woodpeckers: A modeling approach}, volume={58}, DOI={10.2307/3809319}, number={3}, journal={Journal of Wildlife Management}, author={Heppell, S. S. and Walters, J. R. and Crowder, L. B.}, year={1994}, pages={479} }