H. Butts
发表
Marshall Hall,
Henry B. Mann,
M. Hall,
1954,
Canadian Journal of Mathematics.
H. Butts,
Carlos G. Sphat,
1972
.
H. Butts,
R. W. Yeagy,
1976
.
J. Gilbert,
H. Butts,
1968
.
H. Butts,
R. H. Cranford,
R. Cranford,
1964
.
H. Butts,
Philip Quartararo,
H. S. Butts,
1975
.
H. Butts,
R. C. Phillips,
1965,
Canadian Journal of Mathematics.
R. Gilmer,
H. Butts,
1966,
Canadian Journal of Mathematics.
H. Butts,
N. Vaughan,
1969
.
H. Butts,
1964
.
H. Butts,
1965
.
H. Butts,
L. Wade,
1966
.
H. Butts,
W. W. Smith,
1966
.
D. Estes,
H. Butts,
1968
.