Scattering state solutions of the Duffin-Kemmer-Petiau equation with the Varshni potential model O. J. Oluwadare and K. J. Oyewumi Eur. Phys. J. A, 53 2 (2017) 29 Published online: 17 February 2017 DOI: 10.1140/epja/i2017-12218-5