On the Functional Equation f (x + t, y) + f (x - t, y) = f (x, y + t) + f (x, y - t).
Haruki, Hiroshi
Aequationes mathematicae, Tome 5 (1970), p. 118-119 / Harvested from Göttinger Digitalisierungszentrum
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Publié le : 1970-01-01
EUDML-ID : urn:eudml:doc:136120 
@article{GDZPPN002024624,
     title = {On the Functional Equation f (x + t, y) + f (x - t, y) = f (x, y + t) + f (x, y - t).},
     journal = {Aequationes mathematicae},
     volume = {5},
     year = {1970},
     pages = {118-119},
     zbl = {0207.45802},
     url = {http://dml.mathdoc.fr/item/GDZPPN002024624}
}

Haruki, Hiroshi. On the Functional Equation f (x + t, y) + f (x - t, y) = f (x, y + t) + f (x, y - t).. Aequationes mathematicae, Tome 5 (1970) pp. 118-119. http://gdmltest.u-ga.fr/item/GDZPPN002024624/