Unions of Identifiable Classes of Total Recursive Functions. - Kalvis Apsitis; Rusins Freivalds; Martins Krikis; Raimonds Simanovskis; Juris Smotrovs (AII, 1992)

Consistent and Conform Identification by Total Recursive Strategies. - Raimonds Simanovskis (J. Inf. Process. Cybern., 1994)

Unions of identifiable families of languages. - Kalvis Apsitis; Rusins Freivalds; Raimonds Simanovskis; Juris Smotrovs (ICGI, 1996)

Closedness Properties in EX-Identification of Recursive Functions. - Kalvis Apsitis; Rusins Freivalds; Raimonds Simanovskis; Juris Smotrovs (ALT, 1998)

Closedness properties in ex-identification. - Kalvis Apsitis; Rusins Freivalds; Raimonds Simanovskis; Juris Smotrovs (Theor. Comput. Sci., 2001)