@article{MRR_2024__5__21_0,
     author = {Shoji Yokura},
     title = {Co-operational bivariant theory},
     journal = {Mathematics Research Reports},
     pages = {21--55},
     publisher = {MathOA foundation},
     volume = {5},
     year = {2024},
     doi = {10.5802/mrr.20},
     language = {en},
     url = {https://mrr.centre-mersenne.org/articles/10.5802/mrr.20/}
}