Integer-valued self-exciting periodic threshold autoregressive processes. 
          Pereira, Isabel; Scotto, Manuel; Nicolette, Raquel  
          
          Contributions in Statistics and Inference. Celebrating Nazaré Mendes Lopes' Birthday. (E. Gonçalves, P.E. Oliveira and C. Tenreiro, eds.), Coimbra, Portugal. ISBN:  978-972-8564-51-3, 47 (2015), 81-92  
          http://www.mat.uc.pt/~textos/v47/  
           
            
         |