On the degree of minimal equation for first-order wave equations

TTÜ struktuuriüksus
Loide, R.-K. On the degree of minimal equation for first-order wave equations // Eesti NSV Teaduste Akadeemia toimetised. Füüsika. Matemaatika = Известия Академии наук Эстонской ССР. Физика. Математика = Proceedings of Academy of Sciences of the Estonian SSR. Physics. Mathematics (1982) 31. ak., 4, lk. 434-436. https://www.ester.ee/record=b1264310*est