Nuclear forces with Δ excitations up to next-to-next-to-leading order, part I: Peripheral nucleon-nucleon wavesH. Krebs, E. Epelbaum and U. -G. MeißnerEur. Phys. J. A, 32 2 (2007) 127-137DOI: https://doi.org/10.1140/epja/i2007-10372-y