@article {BeUlCl2017,
    author = {Bean, Christian and Ulfarsson, Henning and Claesson, Anders},
     title = {Enumerations of permutations simultaneously avoiding a
              vincular and a covincular pattern of length 3},
   journal = {J. Integer Seq.},
  fjournal = {Journal of Integer Sequences},
    volume = {20},
      year = {2017},
    number = {7},
     pages = {Art. 17.7.6, 25},
}