He also held the tenure of an associate-professor in the municipal Antonina Nezhdanova Conservatory's opera department.
In the Soviet Union Maliszewski's name was prohibited and in 1950 his conservatory in Odessa was named after Antonina Nezhdanova, who had no links with the institution.
Quinito Valverde was also well known for a popular song called "Clavelitos" (Little Carnations) with words by José Juan Cadenas, which has been sung and recorded by performers as diverse as Conchita Supervía, Lucrezia Bori, Amelita Galli-Curci, Rosa Ponselle, Antonina Nezhdanova, Victoria de los Ángeles, and Florence Foster Jenkins.