1 Correction to: Calc. Var. (2019) 58:117 https://doi.org/10.1007/s00526-019-1560-x

In the published article, the reference cited at the end of the proof of Theorem 5.1 was published incorrectly. The relevant line should read as: “It follows by Morse Theory (see Theorem 7.1(17) in [8]) that F has at most one interior critical point, and it is a simple critical point.”