Rodrigues A S, Fogliano V, Graziani G, Mendes S, Vale A P, Gonçalves C . Nutritional value of onion regional varieties in northwest Portugal. Atlantic Diet – I International Congress, Viana do Castelo-Portugal. 2004.

Oliveira C., Barbosa E., Casal S., Soares L , Vale A.P., Lopes J.C, Oliveira B. , Brito N.V . “Quantification And Variability Of Conjugated Linoleic Acids Levels In Sheep Milk Of Two Autochthonous Portuguese Breeds”. Atlantic Diet – I International Congress, Viana Do Castelo-Portugal. 2004.

Peixoto, V.; Carvalho, G.M.S.; Silva, J.F.; Vale, A.P. BEHAVIOR'S COMPARING ANALYSIS OF THE MAIN “Vinhos Verdes” REGIONAL ROOTSTOCKS FOR Vitis Vinifera L. . Absorption and Use of Soil's Nutritive Elements. 1.st International Symposium ISHS of Wine growing, Trade and Investigation Lisbon 2003.

Jaime P., Vale A. P., Kendle, A. (2001). The role of cistus ladanifer L. in degraded soils in mértola region. Congresso Nacional da Sociedade Portuguesa da Ciência do Solo, Instituto Superior de Agronomia, Lisboa  

Vale, A.P. (1994). Influência da acção de correctivos orgânicos em dois solos do Noroeste. Tese de Mestrado, Universidade Técnica de Lisboa, I.S.A., 158 pp.