Nasrin Soltankhah. On directed trades. Australasian J. Combinatorics, 11:59-66, 1995. [doi]
@article{Soltankhah95, title = {On directed trades}, author = {Nasrin Soltankhah}, year = {1995}, url = {http://ajc.maths.uq.edu.au/pdf/11/ocr-ajc-v11-p59.pdf}, researchr = {https://researchr.org/publication/Soltankhah95}, cites = {0}, citedby = {0}, journal = {Australasian J. Combinatorics}, volume = {11}, pages = {59-66}, }