1. The genera of Corvidae and their relationships;Amadon;Am. Museum Novitates,1944
2. On the evolution of hoarding behavior;Andersson;Anim. Behav.,1978
3. Recovery of cached seeds by a captive Nucifraga caryocatactes;Balda;Z. Tierpsychol.,1980
4. Are seed caching systems co-evolved?;Balda,1980
5. Avian impacts on pinyon-juniper woodlands;Balda,1987