• https://repositorio-aberto.up.pt/handle/10216/176054
• https://repositorio-aberto.up.pt/handle/10216/176058
• https://repositorio-aberto.up.pt/handle/10216/176068
• https://repositorio-aberto.up.pt/handle/10216/176073
• https://repositorio-aberto.up.pt/handle/10216/176078
• https://repositorio-aberto.up.pt/handle/10216/176079
• https://repositorio-aberto.up.pt/handle/10216/176080
• https://repositorio-aberto.up.pt/handle/10216/176081
• https://repositorio-aberto.up.pt/handle/10216/176082
• https://repositorio-aberto.up.pt/handle/10216/176086
• https://repositorio-aberto.up.pt/handle/10216/176089
• https://repositorio-aberto.up.pt/handle/10216/176107
• https://repositorio-aberto.up.pt/handle/10216/176179