Zulfiqar Habib, Manabu Sakai. On PH quintic spirals joining two circles with one circle inside the other. Computer-Aided Design, 39(2):125-132, 2007. [doi]
@article{HabibS07:1, title = {On PH quintic spirals joining two circles with one circle inside the other}, author = {Zulfiqar Habib and Manabu Sakai}, year = {2007}, doi = {10.1016/j.cad.2006.10.006}, url = {http://dx.doi.org/10.1016/j.cad.2006.10.006}, tags = {Spiral}, researchr = {https://researchr.org/publication/HabibS07%3A1}, cites = {0}, citedby = {0}, journal = {Computer-Aided Design}, volume = {39}, number = {2}, pages = {125-132}, }