LIMU PhD students Asfandiyarov Shamil, Kvashennikova Anastasia, and Ponomarchuk Ekaterina have completed the series of the qualifying exams with the final one in their specialization – "Acoustics". All our PhD students got excellent grades and express their gratitude to their professor Oleg Sapozhnikov for the high-quality and enjoyable preparation for the exam! Congratulations and good luck with their further scientific work!