TY - JOUR ID - 128999244 TI - General solution and invariants for a class of lagrangian equations governed by a velocity-dependent potential energy. AU - Engels, E. AU - Sarlet, Willy PY - 1973 DB - UniCat UR - https://www.unicat.be/uniCat?func=search&query=sysid:128999244 AB - ER -