Dap Hartmann. Butterfly Boards. ICGA Journal, 11(2-3):64-71, 1988. [doi]
@article{Hartmann88b,
title = {Butterfly Boards},
author = {Dap Hartmann},
year = {1988},
doi = {10.3233/ICG-1988-112-303},
url = {https://doi.org/10.3233/ICG-1988-112-303},
researchr = {https://researchr.org/publication/Hartmann88b},
cites = {0},
citedby = {0},
journal = {ICGA Journal},
volume = {11},
number = {2-3},
pages = {64-71},
}