On one combinatorial lemma

2011 ◽  
Vol 272 (S1) ◽  
pp. 186-196
Author(s):  
Yu. A. Shashkin
Keyword(s):  
1972 ◽  
Vol 40 (3) ◽  
pp. 719-721 ◽  
Author(s):  
Stephen Simons
Keyword(s):  

1981 ◽  
Vol 30 (3) ◽  
pp. 321-325 ◽  
Author(s):  
Robert M Freund ◽  
Michael J Todd

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