Hi! I am using a non-parametric bootstrap to calculate SEs and 95% confidence intervals of occupancy values in unmarked in R. I want to infer if the difference between the occupancy value of year 3 is significantly different than the one in year 3. I was advised to rest the CIs of both years and if this difference did not cross zero, then it was significant. However, I can not find a citation or reference for this. Can anyone help please?