Note on the regular digraphs
Rendiconti del Seminario Matematico della Università di Padova, Tome 73 (1985), pp. 95-98. 
@article{RSMUP_1985__73__95_0,
     author = {Marcu, D\u{a}nu\c{t}},
     title = {Note on the regular digraphs},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {95--98},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {73},
     year = {1985},
     mrnumber = {799900},
     zbl = {0575.05033},
     language = {en},
     url = {http://archive.numdam.org/item/RSMUP_1985__73__95_0/}
}
TY  - JOUR
AU  - Marcu, Dănuţ
TI  - Note on the regular digraphs
JO  - Rendiconti del Seminario Matematico della Università di Padova
PY  - 1985
SP  - 95
EP  - 98
VL  - 73
PB  - Seminario Matematico of the University of Padua
UR  - http://archive.numdam.org/item/RSMUP_1985__73__95_0/
LA  - en
ID  - RSMUP_1985__73__95_0
ER  - 
%0 Journal Article
%A Marcu, Dănuţ
%T Note on the regular digraphs
%J Rendiconti del Seminario Matematico della Università di Padova
%D 1985
%P 95-98
%V 73
%I Seminario Matematico of the University of Padua
%U http://archive.numdam.org/item/RSMUP_1985__73__95_0/
%G en
%F RSMUP_1985__73__95_0
Marcu, Dănuţ. Note on the regular digraphs. Rendiconti del Seminario Matematico della Università di Padova, Tome 73 (1985), pp. 95-98. http://archive.numdam.org/item/RSMUP_1985__73__95_0/

[1] M. Behzad, - G. CHARTRAND - C. E. WALL, On minimal regular digraphs with given girth, Fund. Math., 69 (1970), pp. 227-231. | MR | Zbl

[2] M. Behzad, Minimal 2-regular digraphs with given girth, J. Math. Soc. Japan, 25 (1973), pp. 1-6. | MR | Zbl

[3] F. Harary, Graph theory, Addison-Wesley, Reading, Mass., 1969. | MR | Zbl