Abele M, Balodis J, Janpaule I, Lasmane I, Rubans A, Zariņš A. Digital zenith camera for vertical deflection determination. GAC [Internet]. 2012Dec.21 [cited 2024Apr.20];38(4):123-9. Available from: https://journals.vilniustech.lt/index.php/GAC/article/view/4756