1. Classes of Directed Graphs;Bang-Jensen,2018
2. Tournaments and semicomplete digraphs;Bang-Jensen,2018
3. Circular-arc bigraphs and its subclasses;Basu;J. Graph Theory,2013
4. Oriented trees in digraphs;Berry;Discrete Math.,2013
5. On the representation of a large even integer as the sum of a prime and the product of at most two primes;Chen;Kexue Tongbao,1966