Although there are some examples where unmarked dynamic verbs have present reference (see Example 101: a taak 'I'm talking about'), it is more frequent to find unmarked dynamic verbs with past (perfective) reference.
Unmarked dynamic verbs may also refer to present tense when their function is habitual/generic.
Source: Escure 1992
Source: Escure 1980-1989: 43
Source: Escure 2004: 531
Source: Escure 1992
Source: Escure 1983: 34
Source: Escure 1997: 114
Source: Escure 1993: 240
Source: Escure 2004: CD