Two special convolution products of ( n / 2 - k - 1 ) -th derivatives of Dirac delta in hypercone. Aguirre Téllez, Manuel A. — 2001 Applied Mathematics E-Notes [electronic only]
A convolution product of ( 2 j ) th derivative of Dirac's delta in r and multiplicative distributional product between r - k and ∇ ( ▵ j δ ) . Aguirre Téllez, Manuel A. — 2003 International Journal of Mathematics and Mathematical Sciences