Vol. 4 never published; v. 7 published in 2 pts.
Suspended with v. 9 (1978/1979), published in 1981; and resumed with Nova sér., v. 3 (1984/1985), published in 1986; nova sér., v. 1 for 1980/1981 and v. 2 for 1982/1983 were published in 1987 and 1988.