Multiplicative Magic Square/Examples/Order 3/Smallest/Historical Note

Historical Note on Multiplicative Magic Square with Smallest Magic Constant
The order $3$ multiplicative magic square with the smallest magic constant is believed to have been discovered by in $1893$.

Some sources erroneously ascribe it to in $1913$, as work by  has only recently come to light.

It is also sometimes erroneously ascribed to, who in $1917$ also rediscovered it.