Sg-Pl tripartite

SgPl-18a: If singular-plural alternation is attested in the language, do at least some verbs have a tripartite distinction?

This feature is described in the feature set Singular-plural verb stem alternation.

It is authored by David Inman and Marine Vuillermet with Natalia Chousou-Polydouri and Anna Graff and Balthasar Bickel and Nora Muheim and Kellen Parker van Dam and Selma Hardegger and David Timothy Perrot. cite