Bishop, David W. Max Planck Institute for Medical Research, Max Planck Society;
Hoffman-Berling, Hartmut Max Planck Institute for Medical Research, Max Planck Society;
http://onlinelibrary.wiley.com/doi/10.1002/jcp.1030530308/epdf (Any fulltext)
https://doi.org/10.1002/jcp.1030530308 (Any fulltext)
Bishop, D. W., & Hoffman-Berling, H. (1959). Extracted mammalian sperm models. Journal of Cellular Physiology, 53(3), 445-466. doi:10.1002/jcp.1030530308.