Eric Swartz, Nicholas J. Werner. On the number of reachable pairs in a digraph. Australasian J. Combinatorics, 77:184-223, 2020. [doi]
@article{SwartzW20, title = {On the number of reachable pairs in a digraph}, author = {Eric Swartz and Nicholas J. Werner}, year = {2020}, url = {http://ajc.maths.uq.edu.au/pdf/77/ajc_v77_p184.pdf}, researchr = {https://researchr.org/publication/SwartzW20}, cites = {0}, citedby = {0}, journal = {Australasian J. Combinatorics}, volume = {77}, pages = {184-223}, }