PHYSICS LETTERS A, vol.384, no.35, 2020 (SCI-Expanded)
Writing the Hirota-Satsuma (HS) system of equations in a symmetrical form we find its local and new nonlocal reductions. It turns out that all reductions of the HS system are Korteweg-de Vries (KdV), complex KdV, and new nonlocal KdV equations. We obtain one-soliton solutions of these KdV equations by using the method of Hirota bilinearization. (C) 2020 Elsevier B.V. All rights reserved.